Free
Free
$0 per month on Free.
- Identities
- 3 agent identities
- Mail storage
- 1 GiB stored mail per mailbox
- iMessage
- Up to 2,000 iMessages per month
Finding the possibilities
Inkbox
● Identity checkedCode · Vendor site 2026-10-04
Inkbox gives AI agents a unified identity with email, phone, iMessage, a public internet address, and Agent2Agent channels plus a credential vault. Y Combinator–backed Inkbox ships plugins for Claude Code, Codex, ChatGPT, and other agent hosts so agents can communicate like teammates.
- Category
- Code
- Free access
- Free plan is $0/month with three agent identities, each including an inbox, public URL, shared iMessage with phone calls, A2A channel, and 1 GiB stored mail per mailbox.
- API access
- Docs and integrations pages describe agent signup flows, plugins, and IMAP/SMTP access for identities.
Is Inkbox right for you?
A good fit for
Developers and startups operating multiple agents that need real-world contact surfaces and cross-channel memory.
Before you choose
Free tier caps iMessage usage at 2,000 messages per month and three unique recipients at a time with recipient-initiated conversations.
Agent communication identity
Inkbox packages inboxes, telephony, iMessage, tunnels, and A2A into per-agent identities with vault access and first-party plugins for popular coding agents.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Identity surfaces | Homepage lists email, phone, iMessage, internet address, and Agent2Agent channels under one identity. | Facts sourced | 2026-10-04 |
| Agent plugins | Site documents install flows for Claude Code, Codex, OpenCode, ChatGPT, and Hermes plugins. | Facts sourced | 2026-10-04 |
| Memory | Marketing emphasizes cross-channel memory tied to people rather than individual threads. | Facts sourced | 2026-10-04 |
Understand the total cost
Inkbox pricing & plans
Developer
$30.00 /mo
$30 per month on Developer.
- Identities
- 10 agent identities
- Phone
- 1 dedicated VoIP number with SMS/MMS allowances
- Domains
- 10 custom email domains
Startup
$200.00 /mo
$200 per month on Startup.
- Identities
- 100 agent identities
- Phone
- 9 VoIP numbers plus 1 dedicated iMessage number
- Domains
- 100 custom email domains
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Explore toolThe practical questions
Frequently asked questions
What's an identity on Inkbox?
Inkbox pricing FAQ defines an identity as an agent communication surface with mailbox, optional phone/iMessage, public internet address, contacts, and credential vault access.
What's a custom email domain?
FAQ explains custom domains let identities send and receive from a domain you own instead of the default inkboxmail.com addresses on paid plans.
What is Inkbox used for?
Inkbox gives AI agents a unified identity with email, phone, iMessage, a public internet address, and Agent2Agent channels plus a credential vault. Y Combinator–backed Inkbox ships plugins for Claude Code, Codex, ChatGPT, and other agent hosts so agents can communicate like teammates.
Does Inkbox have a free plan?
Free plan is $0/month with three agent identities, each including an inbox, public URL, shared iMessage with phone calls, A2A channel, and 1 GiB stored mail per mailbox.. This record lists ongoing free access; check the plan limits before starting.
How much does Inkbox cost?
The listed monthly price is $30.00 USD at monthly billing. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use Inkbox through an API?
Docs and integrations pages describe agent signup flows, plugins, and IMAP/SMTP access for identities.. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
Free tier caps iMessage usage at 2,000 messages per month and three unique recipients at a time with recipient-initiated conversations.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Identity and profile
Reviewed vendor source
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.