Compare/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.

Starting price

GMass

$20/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

$37.60/mo Free trial

Cold-email infra for teams farming many sending mailboxes. Outreach Growth is $37.60/mo billed yearly, or $47/mo monthly.

Where Instantly fits

Outbound recruiting teams sending at volume
Agencies running many sending accounts
Desks that need warmup plus a unibox
Recruiters who want an agent to find candidates and send first outreach

At a glance

Detail	GMass	Instantly
Starting price	$20/mo	$37.60/mo
Free tier	–No	–No
Free trial	Yes	Yes
MCP server	–No	✓Yes
Public API	✓Yes	✓Yes
Listed under	Lead generation, Outreach	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, plus an AI Recruiting Agent that finds candidates from a job link and emails them.

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
AI Recruiting Agent sources candidates and drafts outreach from a job link
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

$20/mo

Standard is $20/month billed yearly ($249), or $29.95 monthly. Premium is $29/month yearly ($349), or $39.95 monthly, and adds sequences and the API. Professional is $49/month yearly ($599), or $59.95 monthly, with inbox rotation, and team plans cost more. Confirm current terms on the vendor site.

Checked 4 Nov 2026

Instantly

$37.60/mo

Outreach plans: Growth $37.60/mo billed yearly, or $47 monthly, for 5,000 emails and 1,000 contacts; Hypergrowth $85.58/mo yearly, or $107 monthly, for 125,000 emails and 25,000 contacts; and Light Speed $286.30/mo yearly, or $358 monthly, for 500,000 emails. Lead credits are a separate plan from $47/mo, and bundles of both start at $94/mo. Every plan has unlimited email accounts and warmup. Confirm current terms on the vendor site.

Checked 4 Nov 2026

Common questions

Is GMass cheaper than Instantly?

GMass starts lower, at $20/mo against $37.60/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?

All GMass alternatives All Instantly alternatives Every Lead generation tool

Editorial listings, never paid rankings. Prices checked 4 Nov 2026. Confirm current terms on the vendor site. Spot an error?