Head to head

GMass vs Instantly

Same facts, side by side: starting price, free tier, MCP, API and what each one is actually built for.

GMass

$29.95/mo Free trial

Mail merge and cold email that runs inside Gmail. Standard is $29.95/mo, or $20/mo billed yearly at $249.

Where GMass fits

People who already send from Gmail
Small teams running mail merges
Senders who want follow-ups on Premium
Teams that later need inbox rotation

Instantly

$47/mo Free trial

Cold-email infra for teams farming many sending mailboxes. Public Outreach start is $47/mo monthly.

Where Instantly fits

Outbound recruiting teams sending at volume
Agencies running many sending accounts
Desks that need warmup plus a unibox
MCP/API automation around campaigns

At a glance

Detail	GMass	Instantly
Starting price	$29.95/mo	$47/mo
Free tier	–No	–No
Free trial	Yes	Yes
MCP server	–No	✓Yes
Public API	✓Yes	✓Yes
Listed under	Lead generation, Outreach	Lead generation, Outreach

Where they pull apart

GMass

Stands out: Every plan sends unlimited emails from your own Gmail account and includes free address verification.

Watch out: Standard has no follow-up sequences, A/B tests or API. Those start on Premium at $39.95/mo, and inbox rotation needs Professional.

Not the right fit for

Teams not on Gmail or Google Workspace
Buyers who need sequences on the cheapest plan

Instantly

Stands out: Warmup, unibox, and volume send with hosted MCP and a public API.

Watch out: Deliverability still depends on your domains and inboxes, not the tool alone.

Not the right fit for

Teams that only need LinkedIn messaging
Buyers looking for an ATS

Pros and cons

GMass

Unlimited emails on every plan
Works inside Gmail
Standard from $20/mo billed yearly

No sequences on Standard
API starts on Premium
Gmail and Google Workspace only

Instantly

Warmup and unibox in the same desk
Hosted MCP plus REST API
No-card get-started path on the vendor site

Sending domains and inboxes are bought separately
Sequence designer is plainer than multichannel rivals
Volume tiers step up quickly as mailboxes grow

What each one costs

GMass

$29.95/mo

Standard is $29.95/month, or $20/month billed yearly ($249). Premium is $39.95/month ($29 yearly) and adds sequences and the API. Professional is $59.95/month ($49 yearly) with inbox rotation, and team plans cost more. Confirm current terms on the vendor site.

Checked 19 Sep 2026

Instantly

$47/mo

From ~$30/mo. Confirm current terms on the vendor site.

Checked 17 Sep 2026

Common questions

Is GMass cheaper than Instantly?

GMass starts lower, at $29.95/mo against $47/mo for Instantly. That is the entry plan on each side, so the real number depends on seats and the tier you land on.

Can you try GMass or Instantly for free?

Neither carries a free tier on our listing. GMass offers a free trial. Instantly offers a free trial.

Does GMass or Instantly have an MCP server?

Instantly ships a first party MCP server, so an AI assistant can work the product directly.

Not the pair you wanted?

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Editorial listings, never paid rankings. Prices checked 19 Sep 2026. Confirm current terms on the vendor site. Spot an error?