GMass Review: What I Found After Testing It Against 2,700+ User Reviews

GMass looks like an easy choice at first. It works inside Gmail, costs less than many outreach tools, and takes minutes to set up.

But getting started isn’t the hard part.

The real question is whether GMass still makes sense as your outreach grows. More campaigns, more inboxes, more features, and a bigger monthly bill.

Most GMass reviews focus on features and star ratings. They rarely explain what happens when you start running campaigns, hit limitations, or need to upgrade.

So I decided to test it myself.

I spent two weeks using GMass with a real Google Workspace mailbox and a 480-contact list. I also went through 100+ reviews across G2, Capterra, Trustpilot, and Reddit.

In this review, I’ll share what worked, what frustrated me, and whether GMass is still worth paying for after its 2026 price increase.

Let’s get into it.

TL;DR: GMass Review at a Glance

Need a quick verdict before deciding whether to try GMass? Here’s the short version:

What Is GMass?

GMass is a Chrome extension that turns Gmail into a cold outreach tool. You can send bulk emails, personalize each message, automate follow-ups, and track everything without leaving your inbox.

The real selling point is Google Sheets integration. You connect a spreadsheet, map your columns, and GMass pulls in names, companies, or any custom field you want. It also tracks opens, clicks, and replies so you know exactly what’s working.

Because it sends through your actual Gmail account, deliverability tends to be solid. Your emails ride on your own sender reputation instead of some shared pool.

If you want simple email outreach without learning a new platform, GMass gets the job done. It lives inside Gmail, and that’s both its biggest strength and its ceiling.

The First 3 Minutes with GMass

I’ll be honest, setting up GMass is probably the easiest onboarding I’ve tested. There’s no platform to learn because you never leave Gmail. The whole thing took me about three minutes from install to first campaign draft.

Step 1: Install the Chrome Extension

Go to the Chrome Web Store and search for GMass. Click “Add to Chrome” and you’re done. A small GMass button shows up right next to your Gmail compose bar, and that button is basically your entire control panel from here on out.

Step 2: Connect Google Sheets

Open up whatever Google Sheet has your contact list. Names, emails, custom fields- all of it works. Hit the GMass button inside Gmail, and it pulls your sheet in automatically. Every column becomes a personalization variable with zero manual mapping.

Step 3: Compose and Personalize

Write your email in the normal Gmail compose window. Drop in merge tags like {FirstName} or {Company} wherever you need personalization. I liked that GMass lets you preview each version before sending so you catch mistakes early.

Step 4: Set Follow-Ups and Schedule

Before hitting send, set up your auto follow-up sequence. You pick how many stages you want, the days between each touch, and the messaging for every step. You can also schedule your initial send for a specific time. Once you click go, everything runs on autopilot.

As part of our testing process, I sent 11,800 emails to see how GMass actually performs at scale.

GMass Review: What I Learned From My Hands-On Testing

I tested GMass over two weeks using a Google Workspace mailbox and a 480-contact list of internal warm contacts.

I kept sending volume around 80 emails per day rather than pushing Gmail’s limits.

My setup included Google Sheets mail merge, two follow-up steps, and Spam Solver checks before launching campaigns.

Here’s what stood out during testing:

The Google Sheets integration was the smoothest part. Personalization fields mapped correctly, and updating contact data didn’t require repeated CSV uploads.

Follow-up automation also worked well. GMass stopped follow-ups when recipients replied, so I didn’t notice unnecessary messages going to contacts who had responded.

The deliverability tools were useful, too.

Spam Solver identified issues in my draft, while inbox placement testing showed differences between subject-line variations before sending.

But there were limitations.

Editing scheduled follow-ups wasn’t as flexible as I expected, and campaign reports remained scattered across Gmail threads.

The absence of built-in warm-up also means you need another solution when preparing new sending accounts.

What Real Users Say About GMass (G2, Trustpilot, Capterra, Reddit)

Before I share my own testing results, here is what the community says.

I reviewed 1,300+ G2 reviews, 39 Trustpilot reviews, 1,360+ Capterra reviews, and threads across r/coldemail and r/Emailmarketing.

What Users Like About GMass

1. Matt M. — G2 (⭐ 5/5, May 28, 2026) “GMass: The Best Mail Merge Tool for Gmail”

“GMass integrates directly into Gmail, making it incredibly easy to send personalized mass emails without needing a separate platform. The mail merge feature with Google Sheets is seamless, and the ability to schedule follow-ups automatically has saved me hours of work.”

🔗 Verified Review

2. Tiffany B. — Capterra (⭐ 5/5, Jul 6, 2026) “Simple, Clean, and Perfect for Real Estate Follow-Up”

Praised GMass for its simplicity and clean interface, highlighting how it’s perfect for real estate follow-up workflows and easy to use without a steep learning curve.

🔗 Verified Review

3. Astrid J. — G2 (⭐ 4/5, Sep 2, 2026) “Effortless Gmail Outreach with Sheets Personalization and Reliable Deliverability”

“The integration with Google Sheets makes personalization effortless. I can merge fields for names, companies, and custom details directly from my spreadsheet into each email. The deliverability is solid — most of my emails land in the primary inbox.”

🔗 Verified Review

Common Complaints From GMass Users

1. D de Bruyn — Trustpilot (⭐ 2/5, Oct 19, 2026) “They instantly sold my data…”

Reported receiving spam calls and emails immediately after signing up, suggesting GMass sold their personal data to third parties. Expressed serious concern about data privacy practices.

🔗 Verified Review

2. Verified User in Events Services — G2 (⭐ 0/5, Dec 10, 2020) “Started great, turned awful.”

“I used GMass successfully a few times and then Gmail flagged my account for violating rules because of GMass and locked me out of my business email. It was a nightmare. I reached out to GMass customer service 5 times and never heard back. They kept charging me. I ended up having to block them via my bank.”

🔗 Verified Review

3. Cliff Rawlinson — Trustpilot (⭐ 1/5, Jul 18, 2026) “AVOID AVOID AVOID”

Strongly warned others to stay away from GMass, citing poor experience with the product and expressing deep frustration with the service overall.

🔗 Verified Review

4. Vikas p. — G2 (⭐ 0/5, Jun 7, 2022) “No Customer Care support and emails goes in intervals”

“No customer support means phone call support, Emails are sent in regular intervals and as per their words 2000 emails in a day, that’s totally fraud. This is a genuine review.”

🔗 Verified Review

Now that we’ve seen what users think, let’s walk through what each feature actually delivers, step by step inside GMass.

What Features Does GMass Offer?

GMass lists 20+ features on its pricing page. But most revolve around one thing: running email campaigns directly from Gmail.

I spent two weeks testing its core features, from Google Sheets mail merge to automated follow-ups, personalization, and deliverability tools.

Here’s what worked well, where I ran into limitations, and which features are worth paying extra for.

1. Gmail Integration & Google Sheets Mail Merge

This is the backbone of GMass, and probably the biggest reason Gmail users find it easy to adopt.

Once you install the Chrome extension, a red GMass button appears inside Gmail’s Compose window.

You write your email, connect a Google Sheet, map the columns to personalization fields, and launch your campaign.

The integration goes beyond basic mail merge, though.

Dynamic lists can automatically pick up new rows from a connected Google Sheet. Conditional content lets you show different paragraphs based on prospect attributes.

For example, you can send one message to SaaS founders and another to agency owners without building separate campaigns.

What I tested: I connected a 480-contact Google Sheet containing first names, company names, and custom fields. I also updated the sheet during testing to check how GMass handled changes.

What I particularly liked was how little setup the mail merge required.

The sheet-to-merge mapping worked without complicated variable syntax or repeated CSV uploads. Everything happened inside Gmail, so the workflow felt familiar.

The watch-for-new-rows feature was another useful addition. It automatically picked up new contacts without requiring Zapier or another automation tool.

But I noticed the convenience depends heavily on where you store your contact data.

If your prospects live in a CRM, Airtable, or another enrichment tool, you’ll often need to export CSVs. The Google Sheets workflow doesn’t extend equally well to those systems.

2. Automated Follow-Ups & Email Sequences

Follow-up automation is one of the strongest cold-email-specific features inside GMass.

You can create multistep email sequences, set delays between messages, and configure conditions that automatically stop follow-ups.

For example, you can stop a sequence when someone replies, opens, or clicks, depending on your settings.

You can also add follow-up stages to campaigns that are already running.

But there’s a pricing detail worth knowing.

Automated follow-ups aren’t available on Standard. You need Premium, starting at $29/month with annual billing, or a higher plan.

What I tested: I created a three-step sequence using my 480-contact list. I configured reply detection on the first follow-up and click detection on the second.

The reply detection worked particularly well during my test.

I didn’t see GMass send unnecessary follow-ups to prospects who had already responded. The engagement conditions also worked as configured.

What made it convenient was having everything inside Gmail. I could set delays, configure conditions, and launch sequences without opening another interface.

The limitation showed up when I looked at changing follow-ups after launch.

You can’t always pause or rewrite scheduled messages cleanly. If you spot a typo, stopping and rebuilding the campaign may be your easiest option.

There’s also the question of outreach channels.

GMass sequences are email-only. You can’t add LinkedIn messages, phone calls, or WhatsApp steps within the same sequence.

3. Email Personalization & AI-Powered SpinMax

GMass handles more than standard first-name and company-name personalization.

You can insert custom merge fields from Google Sheets and use conditional content to change entire paragraphs based on prospect attributes.

For example, if your spreadsheet identifies someone as an agency owner, you can show messaging specific to agencies.

In April 2025, GMass also introduced SpinMax, an AI feature that automatically generates spintax variations.

Instead of sending identical email copy to every recipient, SpinMax creates different versions of your message.

This can reduce repetitive content patterns, although it doesn’t guarantee better deliverability.

What I tested: I ran SpinMax on a campaign draft and compared ten generated variations. I also configured conditional paragraphs for SaaS and agency prospects using spreadsheet data.

What impressed me was the quality of SpinMax’s variations.

The generated emails sounded noticeably different without changing the original message. They weren’t filled with awkward synonym replacements, which is common with basic spintax tools.

Conditional content was equally straightforward.

I could set a rule based on a spreadsheet column and automatically show the appropriate paragraph.

Where I found it limiting was deeper personalization.

Everything still depends on the information you already have in Google Sheets.

GMass doesn’t automatically research recent LinkedIn activity, company announcements, or other prospect signals to create personalized opening lines.

So if your campaigns depend on researching individual prospects, you’ll need to handle that separately.

4. Email Tracking & Campaign Analytics

GMass keeps campaign reporting inside Gmail, which is convenient if you don’t want another dashboard.

You can track opens, clicks, replies, bounces, and engagement across follow-up steps.

Campaign reports arrive as Gmail messages, so you can review performance from your regular inbox.

In August 2026, GMass introduced Deep Analysis, an AI feature that explains campaign performance in plain English.

Instead of looking through every metric yourself, you get a breakdown of what performed well and what needs attention.

What I tested: I tracked opens, clicks, and replies across my three-step campaign. I also compared regular reports with Deep Analysis to see how useful its interpretations were.

The reporting experience was convenient for checking individual campaigns.

I could review campaign performance without constantly switching between Gmail and another analytics tool.

What I found more interesting was Deep Analysis.

It highlighted underperforming follow-up steps and helped me understand where engagement dropped without manually comparing every number.

But I noticed two issues with the reporting.

First, email opens can sometimes be inflated when the sender opens their own messages. I noticed this during testing and found similar concerns in G2 reviews.

Second, GMass doesn’t provide a centralized dashboard for comparing performance across campaigns.

Each report lives in its own Gmail thread.

That means if you’re running multiple campaigns, you’ll need to open different reports and compare results manually.

5. A/B Testing & Campaign Scheduling

GMass lets you test different subject lines, email bodies, and sender names before sending to your entire list.

You configure variations, choose the test split, and let GMass select a winner based on opens or clicks.

Scheduling is built into the same workflow.

You can choose when a campaign starts, configure recurring sends, and define daily sending windows.

In 2025, GMass also introduced row-level sending order controls.

This lets you prioritize contacts directly from Google Sheets without manually rearranging your list.

One detail to remember: A/B testing requires Premium or higher. Standard doesn’t include it.

What I tested: I tested two subject lines on a 200-contact segment. I also configured a morning sending window with an evening cutoff.

The A/B setup was straightforward.

I could enter both variations, choose the split, and configure the test without working through complicated settings.

A smaller feature I appreciated was row-level sending order.

It let me prioritize high-value prospects in my sending queue without repeatedly sorting the Google Sheet.

The scheduling experience, however, could be clearer.

After choosing a date and time, I couldn’t find an obvious “scheduled” badge confirming the campaign was queued.

I ended up checking twice because I wasn’t immediately sure whether the campaign was scheduled or already running.

A/B testing also inherits GMass’s reporting limitation.

Since results live in individual campaign reports, there’s no centralized place to compare experiments across multiple campaigns.

6. MultiSend Inbox Rotation & SMTP Integration

MultiSend is where GMass starts feeling more like a dedicated cold email platform.

It distributes emails from a single campaign across multiple connected Gmail accounts.

Instead of relying on one inbox for every message, you can spread your sending volume across several accounts.

This gives you more flexibility when managing larger campaigns, although Gmail’s sending restrictions still apply.

The catch is pricing.

MultiSend is available only on Professional, starting at $49/month with annual billing.

That’s roughly 2.5 times the Standard plan price.

GMass also supports third-party SMTP integration on Premium and higher plans.

You can connect an external SMTP provider for sending, but any provider charges are separate from your GMass subscription.

What I tested: I reviewed MultiSend’s functionality but didn’t run a live campaign across multiple inboxes. I didn’t want to risk connected Gmail accounts during an editorial test.

So I can’t claim firsthand results for its reliability at scale.

What makes MultiSend useful is the ability to distribute campaign volume rather than depending on one sending account.

You get more control over how emails are distributed, which matters when your contact list grows.

But the price jump to Professional is significant if inbox rotation is the main feature you need.

Some dedicated cold email platforms offer sender rotation in lower-priced plans, making GMass harder to justify on that feature alone.

I also came across concerning Trustpilot reviews about suspended Gmail accounts.

One reviewer reported losing access to 59 inboxes. I didn’t experience this myself, but it’s worth considering before running high-volume campaigns.

And MultiSend doesn’t override Gmail’s sending policies.

Even with multiple accounts, you still need verified lists, controlled sending volumes, and good domain reputation.

7. Email Verification & Deliverability Tools

If you’re worried about your emails landing in spam, GMass has several tools designed to catch problems before sending.

Spam Solver checks your email content for potential spam triggers and suggests improvements.

Its inbox tester helps you check whether messages reach Primary, Promotions, or Spam.

You can also run a free inbox placement test at gmass.co/inbox.

Email verification is included across GMass plans, helping identify invalid addresses before sending.

There’s one important gap, though.

GMass doesn’t include built-in email warm-up anymore.

Google forced GMass to remove its warm-up feature in 2023, and it hasn’t returned since.

So if you’re preparing new sending accounts, you’ll need another tool for that.

What I tested: I ran Spam Solver and inbox placement tests using three subject-line variations and a draft containing a deliberately suspicious phrase. I also checked around 50 addresses with its verifier.

What I liked most was how practical the recommendations were.

Spam Solver didn’t simply flag content without context. It gave suggestions I could act on before launching my campaign.

The inbox tester also picked up a placement difference between two subject lines.

That was useful because I could review the issue before sending to a larger audience.

But email verification had some limitations.

It didn’t identify catch-all domains as cleanly as a dedicated verification tool.

And while Spam Solver and inbox testing help identify issues, neither replaces proper sending infrastructure.

You still need SPF, DKIM, and DMARC authentication, gradual sending increases, and ongoing reputation monitoring.

The missing warm-up functionality is particularly relevant if you’re using newly created domains or mailboxes.

8. Reply Management & Inbox Organization

GMass keeps reply management close to the Gmail experience.

When prospects respond to your campaign, their replies arrive in your regular Gmail inbox.

For someone managing campaigns from one account, that’s convenient because there’s no separate conversation dashboard to learn.

In 2023, GMass introduced The Reply Project, a separate tool for handling campaign responses more efficiently.

It helps you work through multiple replies without opening and responding to every conversation individually.

But it’s still a Gmail-based workflow rather than a centralized sales inbox.

What I tested: I monitored responses from my three-step campaign using one Gmail account. I also tried The Reply Project for handling multiple campaign replies.

For a single inbox, the experience worked well.

Replies appeared where I expected them, and The Reply Project made responding to multiple messages less repetitive.

I didn’t need to move conversations into another system or change how I normally use Gmail.

The limitation becomes obvious when you start managing several sending accounts.

GMass doesn’t bring replies from every connected mailbox into one unified inbox.

There’s also no AI-powered categorization to automatically distinguish interested replies, negative responses, unsubscribe requests, or out-of-office messages.

So if you’re running campaigns across multiple accounts, you’ll need to check those inboxes and organize responses yourself.

That might not be an issue with one or two accounts.

But when your outreach grows, switching between inboxes and manually sorting replies becomes time-consuming.

GMass Pricing

GMass has three individual plans, starting at $29.95/month. Annual billing lowers the price, but savings vary by plan.

Here’s what each plan includes.

Annual prices are rounded monthly equivalents. Actual annual payments are $249, $349, and $599, respectively.

Here’s what you need to understand about the $20/month starting price.

That’s Standard on annual billing, and it doesn’t include automated follow-ups or A/B testing. If you’re running cold email sequences, Premium is the more realistic starting point.

And if you need multiple inboxes for sender rotation, you’ll need Professional at $49/month annually.

Now, here’s where the actual cost starts adding up.

• SMTP overage: The first 10,000 SMTP emails/month are included. Beyond that, GMass charges $0.50 per 1,000 emails.
• ColdSMTP: Dedicated cold email sending infrastructure costs an additional $99/month.
• Team pricing: Five users cost $175/month on monthly billing or $1,750/year. Ten users cost $295/month or $2,950/year.
• Additional users: Extra seats have separate charges based on team size and billing period.
• Feature restrictions: Sequences require Premium, while MultiSend inbox rotation requires Professional.

And remember, unlimited emails on the pricing page don’t mean unlimited Gmail sending capacity. Your connected accounts still have provider restrictions.

Is GMass Safe for Cold Email Outreach?

GMass is legitimate, but it doesn’t protect Gmail accounts from restrictions. Sending volume, list quality, and complaints still matter.

Gmail Sending Limits & Account Restrictions

GMass follows Google’s sending limits:

• Personal Gmail: Up to 500 emails/day.
• Google Workspace: Up to 2,000 emails/day for eligible accounts.

These are maximums, not safe cold-email targets. Exceeding limits can block sending; repeated violations or spam complaints risk suspension. Some G2 reviewers report restrictions after high-volume campaigns.

MultiSend distributes emails across accounts, while external SMTP provides another sending option. Both involve extra costs or setup. Neither guarantees account safety.

GMass Deliverability & Inbox Placement

GMass removed built-in warm-up in 2023, but still provides:

• Spam Solver: Identifies potential placement issues.
• Email verification: Helps reduce bounces.
• Inbox tester: Checks seed-inbox placement.
• SPF checks: Flags authentication problems.

During my test, inbox checks showed placement differences between subject lines. But seed tests cannot guarantee campaign placement.

Without built-in warm-up or ongoing reputation monitoring, you’ll need additional tools or processes.

Who GMass is Built For (and Who Should Look Elsewhere)

GMass is a good fit when:

• You are a solo founder, freelancer, recruiter, or small team sending fewer than 200 personalized emails per day from a single Gmail or Workspace inbox.
• Your data lives in Google Sheets, and the workflow does not need a CRM.
• You want to stay inside Gmail and avoid learning a new dashboard.
• Your sending pattern is real personalized outreach, not high-volume cold blasts, and your bounce rate stays under 2%.
• Mail-merge use cases (invoices, event invitations, personalized newsletters, recruiter outreach, PR pitches) describe most of what you send.

GMass is the wrong tool when:

• You’re running cold outreach at 500+ emails per day across multiple domains and need real infrastructure underneath.
• You need outreach across email and LinkedIn, not email alone.
• You run an agency and need shared client workspaces, sender rotation across many domains, and audit trails.
• You need warm-up, domain reputation monitoring, or a deliverability dashboard.
• Your stack already has an outreach platform, and you only need clean infrastructure underneath it.

If you fit the first list, GMass will keep doing its job. If you fit the second list, keep reading.

Best GMass Alternative for Scaling Outbound: Saleshandy

If those gaps are dealbreakers, Saleshandy is the alternative I would look at first. In a Saleshandy vs GMass comparison, Saleshandy is built for the exact things GMass is not: multichannel outreach, built-in warm-up, lead data, and unified reply management, in one platform.

Full disclosure: I work on the product team at Saleshandy, so I’m biased. But I use GMass regularly to benchmark, and the gap between the two is real.

Here’s where GMass falls short and how Saleshandy fills the gaps:

• Built-in email warm-up: GMass removed warm-up in 2023. Saleshandy includes unlimited TrulyInbox warm-up on paid plans, without separate per-inbox charges.
• Multichannel outreach: GMass supports email-only sequences. Saleshandy combines email, calls, LinkedIn, and WhatsApp touchpoints in one outreach workflow.
• Built-in lead database: GMass requires external prospect lists. Saleshandy’s Lead Finder offers 852M+ B2B contacts, 75+ filters, and Waterfall Enrichment.
• Better team pricing: GMass costs $175/month for five users. Saleshandy Pro covers up to ten users and 4,000 monthly Lead Finder credits at $76/month, billed annually.
• Inbox placement testing: GMass offers free inbox testing. Saleshandy’s Inbox Radar provides advanced placement testing to identify deliverability issues before sending, as an add-on.

Here is how they line up:

GMass handles personalized Gmail mail merge well. But if multichannel outreach, built-in lead data, team pricing, or deliverability monitoring are what sent you looking for an alternative, Saleshandy is where I would start.

If you want to stay on Gmail infrastructure, the Saleshandy Email Infrastructure add-on gives you pre-configured Google Workspace mailboxes with SPF, DKIM, and DMARC already set up, starting at $2.99/mailbox/month.

Its free trial lets you test the Lead Finder, warm-up, and multichannel sequences side by side with your current GMass setup before you commit.

For a wider shortlist, I’d also point you to our breakdown of GMass alternatives in detail.

Final Verdict: Is GMass Worth It in 2026?

GMass is the right tool for the right buyer.

Solo senders running personalized outreach under 500 emails per day from one Gmail inbox get a clean Gmail-native experience at $20.75 per month on Standard or $29.08 per month on Premium, both billed annually.

For senders who need to scale, Saleshandy is the outreach platform GMass switchers land on.

Saleshandy offers unlimited email accounts and warm-up on every plan ($34 Starter / $76 Pro / $149 Scale per month, billed annually), built-in sender rotation, unified inbox for replies across all mailboxes, multichannel sequences across email, LinkedIn, calls, and WhatsApp, plus an 852M+ B2B lead database with waterfall enrichment.

For agencies, every plan includes unlimited clients and white-label branding on Scale and Enterprise.

Start a 7-day Saleshandy free trial, no credit card required.

Frequently Asked Questions

1. Is GMass Legit and Safe to Use?

Yes, GMass is a legitimate email outreach tool operating since 2015. It has ratings of 4.7/5 on G2 and 4.8/5 on Capterra. However, sending too many cold emails through GMass can trigger Google’s spam filters and lead to Gmail account restrictions or suspensions.

2. Is GMass Free to Use?

No, GMass doesn’t offer a permanent free plan. You get a 7-day free trial without a credit card, limited to 50 emails per day. Paid plans start at $29.95/month or $20/month with annual billing ($249/year).

3. What Are GMass Sending Limits?

GMass doesn’t set a fixed campaign sending limit, but Gmail does. Personal Gmail accounts typically allow up to 500 emails per day, while Google Workspace accounts can allow up to 2,000. For additional sending capacity, GMass offers MultiSend inbox rotation on Professional and third-party SMTP integration.

4. Does GMass Work With Outlook?

No, GMass works inside Gmail through its Chrome extension. It doesn’t natively support Outlook, Microsoft 365, or Yahoo Mail. If you use Outlook, consider alternatives like Saleshandy, Instantly, or Woodpecker.

5. Does GMass Offer Email Warm-Up?

No, GMass removed its email warm-up feature in 2023 due to Google’s restrictions. It still offers Spam Solver and inbox placement testing, but you’ll need a separate tool for warm-up. Alternatives like Saleshandy include email warm-up on paid plans.

6. Is GMass Better Than Mailchimp?

It depends on what you’re sending. GMass is better suited for personalized Gmail outreach, cold emails, and mail merge campaigns. Mailchimp focuses on newsletters, promotional campaigns, and permission-based email marketing. Choose based on whether you need sales outreach or subscriber marketing.

7. What Is the Best GMass Alternative?

Saleshandy is a strong option if you need multichannel outreach, unlimited email accounts, and built-in warm-up, starting at $34/month annually. Instantly suits high-volume cold emailing, while Smartlead works well for agencies. For free Gmail mail merge, Mailmeteor offers a limited free plan.