
Agentboxd
Free plan · From $15/moActively maintained
not read yet
Use
- For
- Developers and teams giving AI agents their own email inboxes for sign-ups and support.
- Price
- Free plan · From $15/mopricing page, read Oct 24, 2026
- Activity
- Actively maintainedrelease 2 weeks ago · site updated 4 days ago
- Company
- SynaptrixAI Ltd · Domain since 2026terms of service · domain registered
- Runs as
- API
- Used for
- Read login codes sent to an agent's address
- Answer customer support emails in the same thread
- Draft follow-up emails for human approval
- Has an MCP server (1 in the registry)public registry →
- Publishes llms.txt, a file written for AI assistantsagentboxd.com ↗
Free plan · From $15/mo
- Domain since2026domain registered
- HeadquartersLondon, GBper their site
- Run bySynaptrixAI Ltdterms of service ↗
- Trains on your dataNosecurity page ↗
- Certifications they stateSOC 2 · ISO 27001 · GDPRsecurity page ↗
- Subprocessorspublishedsubprocessor list ↗
- Data processing agreementpublishedDPA ↗
- Privacy policy updated2026-10-12privacy policy ↗
- Security contactsecurity.txt
“We don't train models on your mail.”
security page ↗
These are Agentboxd's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.
- MCP servercom.agentboxd/mcpverified in the MCP registry
- Stateanswers, requires sign-inchecked 2026-10-24
- Address to connectmcp.agentboxd.com/mcp
- OpenAPI spec101 pathsthe spec ↗
- API docsagentboxd.com/docs/apithe vendor's page ↗
- MCP docsagentboxd.com/docs/mcpthe vendor's page ↗
This card as JSON, for your agent →
Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.
Figure and bar: visits/mo, estimate · year: online since
- #1

Sierra
Runs customer service agents for brands that answer and resolve customer conversations across chat, SMS, email and phone.
11.9kActive2023 - #2

SiteSpeakAI
Deploys an AI agent on websites to answer customer questions, capture leads, and perform actions like booking meetings.
919ActiveFrom $29/mo - #3

Famulor AIMCP · sign-in
Deploys voice AI agents that answer inbound calls, run outbound campaigns, and follow up via WhatsApp, email, and SMS across 60 languages.
695ActiveFrom ≈ $0.12 per use2023 - #4

Robotomail
Provides real email addresses and mailboxes for AI agents to send and receive messages via API.
464ActiveFrom $19/mo - #5

OpenMailMCP · sign-in
Gives each AI agent its own address and reads inbound mail over webhook or websocket, parsing attachments to plain text.
321ActiveFrom ≈ $10/mo2026 - #6

AI Email API & Infrastructure for AI AgentsMCP · sign-in
Gives an agent its own email address, sending and receiving mail through an API, with replies scored for prompt injection.
105ActiveFrom $20/mo
Not it? Say what you need
betaThree tools from the Atlas for the job you describe, each with what fits and what does not.
No notes yet. What do you use Agentboxd for?
Sign in to leave a noteWhat is Agentboxd?
Hosts per-agent mailboxes that receive, verify and screen inbound mail before the agent reads it through an API. It is listed in the Atlas under Agents and made by SynaptrixAI Ltd.
Who is Agentboxd for?
Developers and teams giving AI agents their own email inboxes for sign-ups and support.
How much does Agentboxd cost?
Agentboxd has a free plan; paid plans start at $15/mo, per its pricing page on 2026-10-24.
Is Agentboxd free?
Yes, Agentboxd has a free plan, per its pricing page on 2026-10-24.
Do people use Agentboxd?
Little sign of use.
Is Agentboxd still maintained?
Actively maintained: release 2 weeks ago · site updated 4 days ago.
Who owns Agentboxd?
Agentboxd is run by SynaptrixAI Ltd, per its terms of service (2026-10-24).
Does Agentboxd train AI on your data?
No, per its security page (2026-10-24): “We don't train models on your mail.”
Is Agentboxd safe?
We do not audit vendors. What Agentboxd publishes, read 2026-10-24: SOC 2, ISO 27001, GDPR stated on its security page; on training with your data, “We don't train models on your mail.”.
What are alternatives to Agentboxd?
In Agents, by use: Sierra, SiteSpeakAI, Famulor AI, Robotomail, OpenMail, AI Email API & Infrastructure for AI Agents.
How we read a tool
No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.
- Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
- Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
- Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
- The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.
How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.
How we read every tool → · By INITE Atlas Desk
Cookies
Before we count this visit
Analytics and ad measurement tell us which pages and which of our ads do their job: Google Analytics and Google Ads, the Meta pixel, Yandex Metrica, and one first-party id of our own. Nothing is stored until you answer, and declining changes nothing about the site.