Compare/Head to head

Instantly vs Warmbly

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

Starting price

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

Warmbly

$29/mo 14 day free trial

Open-source cold email platform that bundles warmup, unlimited mailboxes, a labelled reply inbox and a map-based local lead finder. Cloud plans price by daily sends from $29 a month with a 14-day free trial, and agencies that want to own the stack can self-host the whole thing free.

Where Warmbly fits

  • Staffing agencies giving each recruiter their own warmed mailbox
  • Teams that want unlimited mailboxes without per-inbox pricing
  • Agencies prospecting local small businesses by area
  • Technical teams that want to self-host cold email

At a glance

DetailInstantlyWarmbly
Starting price$37.60/mo$29/mo
Free tier–No–No
Free trialYes14 day free trial
MCP server✓Yes✓Yes
Public API✓Yes✓Yes
Listed underOutreachOutreach, Deliverability, Lead generation

Where they pull apart

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

Warmbly

Stands out: It is the only full cold email platform in the directory whose sending, warmup and health rules are public code under Apache 2.0, so an agency can read why a mailbox was slowed or run the whole thing on its own server. Paid plans charge by daily send volume with unlimited mailboxes and no seat fees, and the built-in lead finder turns a drawn map area into named owners with checked addresses ready for a campaign.

Watch out: Self-hosting is free but its warmup only pairs the mailboxes on your own instance, with no shared pool and community-only support, so for deliverability the paid cloud is the real product. The Starter plan caps you at 150 cold emails a day, and the CRM, API and A/B tests start on the $89 Grow plan. The lead finder reads small business websites, so it suits local and SMB prospecting rather than finding hiring managers at larger companies.

Not the right fit for

  • Teams needing a large B2B contact database built in
  • Prospecting named decision makers at enterprise companies
  • Non-technical users wanting free deliverability from self-hosting

Pros and cons

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

Warmbly

  • Open source, free to self-host
  • Unlimited mailboxes and warmup on paid plans
  • Map lead finder with checked emails
  • Self-hosted warmup has no shared pool
  • Starter capped at 150 emails a day
  • CRM and API start on $89 plan

What each one costs

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

Warmbly

$29/mo

Four plans priced by daily send volume, all with unlimited mailboxes, unlimited warmup, the unified inbox and analytics: Starter $29/mo (150 cold emails a day), Grow $89/mo (3,000 a day, adds the CRM, A/B variants, API and webhooks), Business $329/mo (15,000 a day, adds a dedicated sign-in address, team roles and audit log) and Enterprise on quote (15,000+ a day, SSO and custom contract). Paying yearly takes 20% off ($23, $71 and $263 a month). No per-seat charge. The 14-day free trial needs no card and allows two mailboxes and 20 cold emails a day. Self-hosting the whole platform is free, but its warmup only pairs your own mailboxes and support comes from the community. Confirm current terms on the vendor site.

Checked 8 Nov 2026

Common questions

Is Instantly cheaper than Warmbly?
Warmbly starts lower, at $29/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 Instantly or Warmbly for free?
Neither carries a free tier on our listing. Instantly offers a free trial. Warmbly offers a 14 day free trial.
Does Instantly or Warmbly have an MCP server?
Instantly and Warmbly ship a first party MCP server, so an AI assistant can work the product directly.

Not the pair you wanted?

All Instantly alternatives All Warmbly alternatives Every Outreach tool

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