Inkbox

Identity and communications layer for AI agents: each agent gets its own email inbox, phone number, iMessage, public internet address and agent-to-agent channel under one identity, with cross-channel memory of the person, contact controls and a credential vault, provisioned through an SDK, CLI or plugin for agent harnesses.

StageUndisclosed

Founded2025

HeadquartersSan Francisco, USA

StatusPrivate

Founded — ycombinator.com · 19 Oct 2026

inkbox.ai

Product

Selected offerings — the AI products recorded here, not the vendor's full catalogue.

Inkbox Infrastructure service Sold on its own

Infrastructure that gives an AI agent its own identity: an email inbox, a phone number and iMessage, a public internet address and an Agent2Agent channel, with memory that follows a person across email, text and calls, per-channel rules on who can reach the agent, and a credential vault; created through an SDK, CLI, MCP or plugin; free for 3 identities, $30 and $200 a month plans, usage overage and a custom enterprise tier.

Similar products 20

No sourced competitor yet: no filing, vendor document or measured-market report read so far names a rival for this company, so none is asserted. The companies below are the closest by what their products do.

How this list is ranked ↗

All 20Shared product type 1Same company status 17

DeepgramLate-stageInkbox and Deepgram Voice Agent API both list voice agent; Inkbox's scale not recorded; ships API service rather than the same layer.2 of 2 capabilitiesDifferent layerCompare KL

Keyframe LabsUndisclosedInkbox and Keyframe Avatars both list voice agent; scale not recorded for either; ships API service rather than the same layer.1 of 2 capabilitiesDifferent layerCompare A

AssemblyAILate-stageInkbox and AssemblyAI Voice Agent API both list voice agent; scale not recorded for either; ships API service and application rather than the same layer.1 of 2 capabilitiesDifferent layerCompare HA

Hume AIUndisclosedInkbox and Empathic Voice Interface (EVI) both list voice agent; scale not recorded for either.1 of 2 capabilitiesShared product typeCompare RA

Resemble AIEarly-stageInkbox and Security Awareness Training both list voice agent; scale not recorded for either; ships API service and application rather than the same layer.1 of 2 capabilitiesDifferent layerCompare NC

NAVER CloudUndisclosedInkbox and CLOVA CareCall both list voice agent; scale not recorded for either; ships API service, application and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompare R

RibbonEarly-stageInkbox and Ribbon API both list voice agent; scale not recorded for either; ships AI agent and API service rather than the same layer.1 of 2 capabilitiesDifferent layerCompare SA

SoundHound AIPublicInkbox and SoundHound Music App both list voice agent; Inkbox's scale not recorded; ships AI agent, agent platform and 1 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompare V

VapiEarly-stageInkbox and Vapi both list voice agent; scale not recorded for either; ships AI agent and agent platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompare FR

Furhat RoboticsUndisclosedInkbox and FurhatAI Creator both list voice agent; scale not recorded for either; ships application, platform and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompare P

PolyAIUndisclosedInkbox and Dialog Studio both list voice agent; scale not recorded for either; ships AI agent and agent platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompare C

CartesiaEarly-stageInkbox and Managed Agents both list voice agent; scale not recorded for either; ships API service and agent platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompare RA

Retell AIUndisclosedInkbox and Retell AI Voice Agents both list voice agent; scale not recorded for either; ships agent platform rather than the same layer.2 of 2 capabilitiesDifferent layerCompare T

TwilioPublicInkbox and Twilio Agent Connect both list voice agent; Inkbox's scale not recorded; ships API service, application and 3 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompare OF

OpenClaw FoundationUndisclosedInkbox and ClawHub both serve buyers who need to have an agent run personal chores end to end; scale not recorded for either; ships AI agent, agent platform and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompare C

CerencePublicInkbox and Dealer Assist Agent both list voice agent; Inkbox's scale not recorded; ships AI agent, application and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompare A

AllooviumUndisclosedInkbox and Alloovium both list voice agent; scale not recorded for either; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompare CA

Callbook AIUndisclosedInkbox and Callbook AI both list voice agent; scale not recorded for either; ships AI agent rather than the same layer.1 of 2 capabilitiesDifferent layerCompare E

EvergroveUndisclosedInkbox and Evergrove both list voice agent; scale not recorded for either; ships AI agent rather than the same layer.1 of 2 capabilitiesDifferent layerCompare L

LunaBillUndisclosedInkbox and LunaBill both list voice agent; scale not recorded for either; ships AI agent rather than the same layer.1 of 2 capabilitiesDifferent layerCompare

Show all 20 related companiesShow fewer

Closest alternatives are pairs a vendor page itself compares. Similar products are matched from what each product does; nothing in that group is asserted as a rivalry.