---
title: "Inkbox"
slug: "inkbox"
status: "active"
last_checked: "2026-07-05"
categories:
  - "phone"
  - "email"
---

# Inkbox

Inkbox gives AI agents a persistent identity with an email inbox, a phone number, and a public tunnel URL.

- Status: active
- URL: https://inkbox.ai/
- Last checked: 2026-07-05
- Freshness: 1 days
- Founded: 2026
- Funding: Backed by Y Combinator (S26 batch)

## Offerings

### Email

- Offering status: live
- What you get: Each agent identity gets a mailbox with a unique @inkboxmail.com address that can send and receive email, with thread management, search, and filtering. Custom sending domains are available on paid plans.
- Acquisition: self_serve
- Geographies: not published
- Pricing: Free tier includes 3 agent identities with mailboxes and no credit card required. Hobbyist is $10/month for 5 identities and 5 custom email domains. Developer is $25/month for 15 identities and 15 custom email domains. Enterprise is custom pricing.
- Pricing URL: https://inkbox.ai/pricing
- API: yes
- SDK: yes
- MCP: not published
- Standards: not published

| Field | Value |
| --- | --- |
| address_model | both |
| direction | both |
| deliverability_handling | not published |
| inbox_api | yes |

### Phone

- Offering status: live
- What you get: Phone-enabled agent identities get a real PSTN number for calls with audio streaming and SMS/MMS, available as an optional add-on to an identity.
- Acquisition: self_serve
- Geographies: not published
- Pricing: Free tier has no phone numbers. Hobbyist ($10/month) includes 1 phone-enabled identity with 300 SMS/MMS and 30 call minutes monthly. Developer ($25/month) includes 3 phone-enabled identities with the same per-identity allowance. Overage is $0.03 per SMS/MMS ($0.02 with a registered 10DLC campaign) and $0.03 per call minute.
- Pricing URL: https://inkbox.ai/pricing
- API: yes
- SDK: yes
- MCP: not published
- Standards: not published

| Field | Value |
| --- | --- |
| number_types | local |
| countries | US |
| capabilities | sms, voice, mms |
| provisioning_time | not published |
| a2p_compliance | not published |
| otp_policy | not published |

## Sources

- https://inkbox.ai/
- https://inkbox.ai/docs/get-started/introduction
- https://inkbox.ai/pricing
- https://github.com/inkbox-ai/inkbox
- https://github.com/inkbox-ai