Inkbox founder Ray Liao stated that when entering Y Combinator, the revenue was zero, and on demo day, the annual recurring revenue crossed $300,000. He asked partner Tyler Bosmeny why he didn't return the call after the interview, to which Bosmeny replied that he had conducted product due diligence with Boris Jabes to confirm that the experience matched the description.

Inkbox is part of YC's Summer 2026 batch, positioned as an identity and communication layer for AI agents: providing agents with independent email, phone, iMessage, and internet addresses, and offering a delegation channel between agents to consolidate multi-channel conversations into a single context. The three-member team is based in San Francisco, with Liao serving as CEO, holding a PhD in computer science from MIT, and previously co-founding the cardiovascular virtual clinic Empallo; co-founders also include Dima Vremenko from Harvard Medical School with a machine learning background, and Alex Wilcox from Northeastern University with a background in computer science, focusing on machine learning and network research. The group partner is Bosmeny, co-founder of Clever. The product is compatible with Claude Code, Codex, Hermes, OpenClaw, etc., and provides SDKs and plugins.

The company was founded in 2025 and publicly launched the identity layer in July 2026; it had previously launched another product. Use cases include pairing engineering, growth, operations, and assistant agents with real email addresses and numbers. Communication between agents is designed as a mediator rather than a direct point-to-point connection. On S26 demo day, about 240 companies presented to around 1,500 investors, with $300,000 ARR being a notable revenue figure in a "season starting from zero," but still lower than the nearly million or higher reported by leading companies in the batch.

After the interview, Bosmeny first tried the product before returning the call, changing the accelerator's selection from pitch intuition to hands-on validation. The jump from zero to $300,000 occurred within the same batch window, corresponding to the need for agents to have a formal identity that can be dialed or emailed, rather than just a conversation in a terminal.

In market mechanics, this is a subscription for developer infrastructure, not consumer traffic. The buyers are teams looking to move agents out of chat windows and into email and phone networks; the sellers are three-person companies packaging numbers, emails, and tunnels. Beneficiaries are YC companies and toolchains that have already treated agents as colleagues; the pressured parties are assistant products that only provide models without reachable identities. Funding was repriced on demo day based on annual recurring revenue metrics, with investors buying a seat fee for the identity layer, not the model itself.

Supplementary structure: The team emphasizes credential vaults and secondary verification, as agents must receive emails and verification codes when logging into the portal. The phone stack previously matched high-priced communication interfaces with open-source solutions.

Source: Public information