Email infrastructure · replacement recipe

Go from AgentMail to AgentMail (free tier)

The job: Application-specific agent inbox wrapper (Logical inboxes, Send, Receive, Threads, Custom-domain routing). Pick where you are today and where you want to land; the move below follows your pick.

From · what you pay for now
AgentMail
AgentMail Developer · $20/mo
Year one+$228modeled
To · your pickBest fit
AgentMail (free tier)
Free plan · $0 a month
Change where you land

The money

$20/mo today $0/mo

AgentMail Developer

Year one, net+$228
Pays back in0.6 months

Modeled from public list prices, with your time at $50 an hour. Show the math

Does it do the job? 4 of 5 covered

  • Logical inboxes
  • Send
  • Receive
  • Threads
  • Custom-domain routing

The work

Setup
About 15 min
Upkeep
None
Watch out
Doesn't cover: Custom-domain routing

Make the move in four steps

  1. Export from AgentMail

    Download your data and files before you change anything.

  2. Check what Free plan keeps

    3 inboxes, 3,000 emails/mo, 3 GB storage; no custom domains listed

    Details

  3. Switch to Free plan

    Change the plan in AgentMail's billing settings before your renewal date.

  4. Check the next bill

    Your next AgentMail invoice should show the lower price. Check that your data and links still work.

Open AgentMailHow to cancel AgentMail
Modeled, not measured. Savings use public prices and planning assumptions: the bill you stop paying, minus the new tool, your upkeep time and your setup time at $50/hour, over the first 12 months. Paths marked Tested by Stackcut were run end to end by us on our own products. They're our tests, not customer results. Check the must-haves in each recipe before you switch.

The whole recipe: 4 ways out, best first

What you use

  • Logical inboxes
  • Send
  • Receive
  • Threads
  • Custom-domain routing

Not covered

  • Mail-server operation
  • Reputation parity
  • Provider abuse handling
  • Full deliverability platform
  • SOC 2 parity

Check before switching

  • Volume and domain limits modeled
  • Domain control verified
  • Bounce/suppression handling
  • Isolation and webhook security
  • Existing cheaper tier checked

Agents: get_recipe("agent-mail-wrapper") on the Stackcut MCP server.

4 ways out, best first

Cheaper planAgentMail (free tier)Saves $228 in year one
$20/mo today → $0/mo · setup 0.25 h · then $240/yr · payback 0.6 mo
If your use fits the free tier (3 inboxes, 3,000 emails/mo, 3 GB storage; no custom domains listed).
Covers 80% of the core features (not: Custom-domain routing)
Free: 3 inboxes, 3,000 emails/mo, 3 GB storage, threads. Custom domains need Developer ($20/mo, 10 domains).
How we got this
You pay now: AgentMail Developerflat price$20/mo
New cost: AgentMail (free tier)free plan$0/mo
Difference each month$20 − $0+$20/mo
Over 12 months+$20 × 12+$240
Setup, once0.25 h × $50/h−$12
Year one+$240 − $12+$228
  • Not counting your time (0.25 h in year one): saves $240 in year one.

Year one = 12 × (what you pay now − the new cost − upkeep) − setup, with your time at $50/hour. Prices are public list prices; hours are Stackcut’s planning estimates. Price it for your team

Sources: agentmail.to
Switch vendorResend (free tier)Saves $190 in year one
$20/mo today → $0/mo · setup 1 h · then $240/yr · payback 2.5 mo
If your use fits the free tier (3,000 emails/mo, 100 emails/day, 3 domains, 30-day data retention; no pay-as-you-go on Free).
Covers 60% of the core features (not: Logical inboxes, Threads)
Resend Free sends and receives on up to 3 domains (3,000/mo, 100/day); you build inbox and thread logic yourself.
How we got this
You pay now: AgentMail Developerflat price$20/mo
New cost: Resend (free tier)free plan$0/mo
Difference each month$20 − $0+$20/mo
Over 12 months+$20 × 12+$240
Setup, once1 h × $50/h−$50
Year one+$240 − $50+$190
  • Not counting your time (1 h in year one): saves $240 in year one.

Year one = 12 × (what you pay now − the new cost − upkeep) − setup, with your time at $50/hour. Prices are public list prices; hours are Stackcut’s planning estimates. Price it for your team

Sources: agentmail.toresend.com
Agent skillResend skills (incl. agent-email-inbox)Priced by usage
Free to install; needs Resend (Pro: 50,000 emails/mo, no daily limit, 10 domains, 5 webhook endpoints; overage $0.90 per 1,000; Scale: 100,000 emails/mo, 1,000 domains, 10 webhook endpoints; overage $0.90 per 1,000; SSO and dedicated IP add-ons)
Agent inboxes and email-triggered workflows on Resend inbound email, instead of a separate agent-inbox service; broadcasts for small lists.
Covers 40% of the core features (not: Logical inboxes, Threads, Custom-domain routing)
Assumes you already pay for an agent that runs skills (an agent that supports Agent Skills (e.g. Claude Code/Cowork, Codex, Cursor, Gemini CLI); the agent's own subscription is not counted); that agent's cost isn't counted. Needs Resend: priced by usage, so this way isn't priced here. Setup (2 h) and upkeep (0.5 h a month) are Stackcut's estimates; not tested by Stackcut.
License: MIT
Install: npx skills add resend/resend-skills
Sources: github.comraw.githubusercontent.comagentmail.to
Replace with AIReplace with AI: application-specific agent inbox wrapperSavings not modeled yet
Retain an email infrastructure provider; implement app-specific inbox state and routing only. Compare AgentMail downgrade/add-ons first.
Covers 100% of the core features
Sources: agentmail.to

Compare before you switch

Read the checked comparisons and workload guides for the tools this recipe replaces.

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