GMass vs Woodpecker: Cold Email Platform Comparison

GMass vs Woodpecker: Cold Email Platform Comparison

GMass meters nothing and is capped by Google. Woodpecker meters the people you contact and caps nothing. Two opposite answers to the same question, and the right one depends on a number most teams have never worked out.

The Quick Answer

GMass is a Chrome extension for Gmail: mail merge, sequences and inbox rotation, from $29.95 a month, with unlimited contacts and sends inside Google's own per-account limits.

Woodpecker's pricing page is a calculator rather than a tier list. It prices contacted prospects from $7.00 per 100, with a Save 25% volume tier, and includes unlimited team members and unlimited connected email accounts.

Both are cheap at small scale. They stop being comparable the moment your list or your mailbox count grows.

Understanding the Core Difference

GMass is a Chrome extension that turns a Gmail account into a mail merge and sequencing tool, so campaigns send from the mailbox you already read.

Woodpecker is a cold email platform priced on the people you actually contact rather than on seats or mailboxes, with warmup built in and unlimited team members and connected email accounts included at no extra cost.

GMass's constraint is the mailbox. Everything on the plan card is unlimited and none of it lifts Google's per-account sending limit, so growth means more Google accounts, and the Professional tier at $59.95 exists to rotate across them.

Woodpecker's constraint is the list. Mailboxes and team seats do not move the bill at all; the meter runs on contacted prospects, and a prospect emailed repeatedly in a month counts once.

That single rule is the whole comparison. GMass costs the same however many people you write to, and Woodpecker costs the same however many mailboxes you write from.

Pricing Comparison

$29.95/moGMass entry plan

Standard

$7.00Woodpecker entry plan

Per 100 contacted prospects

GMass pricing

Annual billing drops Standard to $20 a month, invoiced at $249 a year. One warning for anyone checking these numbers: the pricing page localises currency by visitor region, so a European reader sees pounds or euros rather than the dollar figures above.

Source: GMass Pricing

Woodpecker pricing

Woodpecker does not publish named tiers on the page fetched for this comparison. That page is a calculator priced on contacted prospects, with add-ons switched on individually.

Unlimited team members and unlimited connected email accounts are included at no extra cost, which is the structural argument for the model: you are charged for people reached rather than for seats or mailboxes.

Source: Woodpecker Pricing

What the two cost at a realistic volume

Take an invented but ordinary case: 1,200 new prospects a month, one message each, sent from three mailboxes. The arithmetic is illustrative and uses list prices only.

On GMass that is three Google accounts and, for rotation across them, Professional at $59.95 a month, plus three Workspace seats billed separately by Google.

On Woodpecker, 1,200 contacted prospects at the published $7.00 per 100 is $84 a month before the volume discount the page advertises, the three mailboxes cost nothing if you bring your own, and managed ones are $6 each.

Now raise the list to 12,000 prospects a month and hold the mailboxes at three. GMass does not move. Woodpecker roughly tenfolds. Lower the list to 300 and Woodpecker is around $21 while GMass stays where it is.

Reading the price ladders against each other

Neither headline answers the question. GMass's $29.95 buys a mailbox's worth of capability; Woodpecker's $7.00 is a rate per hundred people.

Model your own monthly contacted-prospect count and your own mailbox count, then price both. If the list is small and precise, Woodpecker's model rewards you and gives away the infrastructure. If the list is large and the sending fits inside a handful of Google accounts, GMass's flat fee is hard to beat.

Two things to check before quoting either. GMass's page localises currency by visitor region. Woodpecker's page no longer publishes the named Starter, Growth, Scale and Max tiers, and the $24 entry price that circulated widely is not on it.

Features Breakdown

GMass lists

• Works inside Gmail
• Unlimited emails, contacts, and campaigns
• Mail merge personalization
• Free email verification
• Automated follow-up sequences
• Spam Solver deliverability tool
• and 3 more listed below

Both tools

• A/B testing

Woodpecker lists

• Unlimited team members
• Unlimited email accounts
• Email warmup included
• Catch-all email verification
• Condition-based campaigns
• Adaptive sending
• and 3 more listed below

GMass key features

• Works inside Gmail
• Unlimited emails, contacts, and campaigns
• Mail merge personalization
• Free email verification
• Automated follow-up sequences
• A/B testing
• Spam Solver deliverability tool
• Custom tracking links
• Inbox rotation
• API and Zapier access

Woodpecker key features

• Unlimited team members
• Unlimited email accounts
• Email warmup included
• Catch-all email verification
• A/B testing
• Condition-based campaigns
• Adaptive sending
• LinkedIn automation (add-on)
• API and integrations (add-on)
• Agency panel (add-on)

GMass's list is Gmail-shaped: mail merge from Sheets, sequences, custom tracking domains, free verification, inbox rotation on the top tier.

Woodpecker's is operations-shaped: adaptive sending, condition-based campaigns, catch-all verification, an agency panel billed per active client, unlimited accounts and unlimited team members.

The clearest signal is what each treats as an add-on. Woodpecker sells LinkedIn automation, API access and the agency panel separately, so its core product is email sending. GMass sells nothing separately, because its core product is one mailbox.

Integration Ecosystem

GMass connects with: Gmail, Google Sheets, Zapier, Google Workspace.

Woodpecker connects with: HubSpot, Salesforce, Pipedrive, Zapier, Make, n8n, Google Sheets, Calendly, Slack.

Both tools integrate with: Google Sheets, Zapier.

Woodpecker's list leans toward workflow: Make, n8n, Google Sheets, Calendly, Pipedrive, alongside the major CRMs.

GMass's important integration is Google itself, and beyond that it leans on Zapier. If your outbound is stitched together with automations, Woodpecker removes more hops; if it starts and ends in a spreadsheet, GMass removes the sync entirely.

Who Should Pick Which

Pick Woodpecker if your team is larger than your sending footprint. Unlimited team members and unlimited connected email accounts mean neither people nor mailboxes move the bill, which is the opposite of every per-seat platform.

Pick GMass if the list is large and the sending is small. A big list worked from one or two Google accounts is the case where a flat fee wins outright, because Woodpecker would charge for every one of those prospects.

Pick Woodpecker if you run several clients. The agency panel at $27 a month per active client is purpose-built, and GMass has nothing equivalent.

Pick GMass if you want to start this afternoon. Install the extension, point it at a spreadsheet, send. Nothing else in this category is that fast.

Where each one sits in a cold outbound stack

Both fill the sender slot. Neither sources or verifies.

Our own doctrine keeps that slot deliberately thin: one message per campaign, no bumps and no thread replies, and volume spread across many low-volume mailboxes so no single address carries too much. LinkedIn runs as its own motion rather than as a step inside an email sequence, because a second LinkedIn message lands under the one that was ignored and reads as a bump whatever the campaign structure says.

That doctrine changes the Woodpecker arithmetic rather than merely colouring it. Its per-prospect model is at its most generous when a prospect receives many messages, and a single-message campaign collects none of that benefit, so we pay the full rate for one touch. It also caps GMass's usefulness at the point where volume needs more low-volume sending addresses than Google will comfortably give one account.

Switching between them

Both export prospects and campaigns to CSV, and neither carries sending reputation across.

Order of operations: suppression lists first, then authenticate the sending domains on the new platform with SPF and DKIM confirmed, then warmup, then a two to three week ramp. Rebuild copy in the new editor rather than pasting it, because merge-tag syntax differs.

Moving GMass to Woodpecker usually also means adding sending addresses, because that is often why you are moving. Provision and warm those before cancelling anything.

Feature Comparison Summary

Getting Started Checklist

1. Count prospects contacted per month, not emails sent. That prices Woodpecker.
2. Count Google accounts you can sensibly send from. That prices GMass.
3. Check your Google Workspace sending limits before relying on GMass's unlimited framing.
4. If you run client work, compare Woodpecker's per-client price against the alternative.
5. Send one real segment through each and read the replies.
6. Confirm which currency GMass's page is showing you.

Final Thoughts

GMass charges for the tool and lets Google cap the volume. Woodpecker charges for the people and caps nothing else. Work out your monthly contacted-prospect count before reading either feature list, because that single number decides this.

Then spend the saved effort on the list, which is what actually moves reply rates.

Related Reading

• Best GMass alternatives
• Best Woodpecker alternatives
• GMass vs Instantly
• GMass vs Smartlead
• Instantly vs Woodpecker
• Best Outreach alternatives

If you would rather have the sending run for you, RevenueFlow books qualified meetings on a pay-per-meeting basis and publishes client results.

Pricing and features are taken from the vendors' own pages. Verify current terms with the vendor before relying on them.