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Endy Inboxes

Cold email infrastructure that lasts

Deliverability
For AI agents
None readiness
About

What is Endy Inboxes

Endy Inboxes handles the technical side of cold email infrastructure — provisioning Google Workspace or Microsoft 365 inboxes, configuring DNS authentication records (SPF, DKIM, DMARC), and running structured warm-up sequences so domains build sender credibility before volume ramps up. It's built for SDRs, BDRs, and founders who need to spin up outbound capacity without hiring a deliverability engineer. The standout capability is its dedicated domain strategy: each inbox operates on its own domain with dedicated IPs, which isolates reputation risk across your sending pool. Growth Plan starts at $100/month for 20 mailboxes and 10,000 emails; Hypergrowth covers 100 mailboxes and 50,000 emails at $400/month. The tool stops at infrastructure — it doesn't include a sequencing or campaign layer, so you'll need a separate sending platform to actually run your outreach.

Deliverability
Capabilities

Key features

Deliverability infrastructure

warmup, spam tests, and sender reputation

Our verdict

Vanderbuild take

Endy Inboxes is a deliverability infrastructure layer — not a sequencer — and for SDRs, BDRs, and founders who keep burning through shared GSuite pools, it solves a real and specific problem. On the agentic readiness front, there's no API and no MCP server; this is UI-only, so you cannot drive it from an agent or orchestration layer without scraping, which limits how far you can automate provisioning workflows. At $100/month to start, the cost of entry is low and the risk to test is minimal — this is one of the more accessible infrastructure plays in the deliverability category. The honest limitation is scope: Endy Inboxes gets your inboxes warm and authenticated, but you'll still need a separate tool to write, sequence, and send your actual campaigns.

Mateusz Sekta
Founder, vanderbuild
Learn more

Our Resources

The wedge

Agentic stack profile

API
Not public

No public programmatic access.

No public API. Not usable from an agent without scraping.

Agentic readiness
None

Not usable from an agent without scraping.

No public API. UI-only. Not usable from an agent without scraping, which we don't recommend.

Stack role
Deliverability

Where this tool slots into an agentic pipeline.

Plays the role of Deliverability in an agentic pipeline. Use it to keep email sending reputation healthy — warmup, spam tests.

Compare

Endy Inboxes alternatives

Tools that solve a similar problem — compared at a glance.

Endy Inboxes(this tool)
Pricing
Client-based
Budget
$
Best for
SDR / BDR, Founder
Readiness
None
API
No
Mailforge
Pricing
Usage-based
Budget
$
Best for
Founder, GTM Engineer
Readiness
Capable
MCP
No
API
REST
Infraforge
Pricing
Usage-based
Budget
$
Best for
SDR / BDR, Agency
Readiness
Limited
API
REST
Answers

Frequently asked questions

Does Endy Inboxes have a public API?

No — there's no publicly documented API as of today. Endy Inboxes is operated through its UI.

How much does Endy Inboxes cost?

Endy Inboxes: pricing is client-based, expect entry tier ($) spend. Full pricing page: https://endyinboxes.com/pricing.

Who is Endy Inboxes best for?

Endy Inboxes is built for SDR / BDR, Founder. Fits Solo, SMB (1-50)-sized teams.