# AgentPhone Aiolum story: https://aiolum.com/story/agentphone/ · added 2026-11-12 · updated 2026-11-12 **In short.** AgentPhone (Phone numbers, calls and texts for AI agents, United States): Live with usage-based pricing, November 2026. Evidence grade E: no revenue figure was checked. Team: 2 founders; team size not published. Launched January 2026; still running. Phone numbers, calls and texts for AI agents · United States · AI-native · team of 2 to 10 · still running · group: Developer tools and coding agents - Outcome: Live with usage-based pricing, November 2026 (evidence grade of the headline number: E; no revenue figure) - Launch: January 2026; months from launch to the outcome: 10 - Team: 2 founders; team size not published - Outside funding: Y Combinator Spring 2026 batch; amount not published - Main factor: Product - Meters, 1 to 4: evidence strength 1, copyable pattern 2, capital needed 2 - Tags: AI-native, Small team, Funded, Running, B2B, Developer tools Links: - Visit agentphone.ai: https://agentphone.ai/ **The product.** A service that gives an AI agent its own phone number. The agent can receive and place calls and send and receive texts. A developer sets it up with one API call, a software package or an MCP server, and pays for what the agent uses. **Why it worked.** AgentPhone sells the phone line, the speech layer and the text channel of an AI agent as one product. The company wrote on 24 April 2026 that a developer otherwise manages four or more vendors for the line, transcription, voice and the model. The company's pricing page lists US$3 a month for a number and no monthly minimum. Evidence grades: A = disclosed by a public company, a filing or a payment processor, or verified by one; B = two or more independent reports agree, or a journalist confirmed it; C = a founder claim that no one else verified; D = reported, not verified: one founder claim or a third-party estimate with no second source; E = no revenue figure found, so the headline is a non-money fact and the other facts carry their own grades; calc = computed on this page from graded facts. ## Summary AgentPhone is telephony infrastructure for AI agents: phone numbers, calls and text messages. A developer gets a US or Canadian number with one API call. The service sends each call transcript and text to the developer's webhook, a web address that receives events. The agent replies with text, and AgentPhone speaks it. Manav Modi and Meet Modi are listed by Y Combinator as the founders, with the titles CEO and CTO. The listing gives the start as 2026 and the batch as Spring 2026. A copy of agentphone.to in the Internet Archive, dated 29 January 2026, already carries the title "Agent Phone – Phone Numbers for AI Agents". The company's pricing page lists US$3 a month for a number and a US$5 credit for each new account. No revenue figure was found, so the story is grade E. The pricing page shows a full price list with a card on file and automatic top-up, and the documentation describes pay-as-you-go billing. No source states that a customer has paid, and the users the company names are its own statement. ## Why did AgentPhone work? ### It bundles the number, the speech layer and texting behind one webhook The home page says voice and messages arrive in the same format at one handler. The company's blog of 24 April 2026 says a developer on Twilio assembles the carrier line, speech-to-text and text-to-speech separately. AgentPhone lists those parts as built in. The blog is the company's own comparison. ### It installs through an MCP server that coding agents already support The company says its MCP server exposes 28 purpose-built tools and installs with one npx command. The home page names Claude Code, Cursor and Windsurf as clients. The Chat SDK by Vercel lists an AgentPhone adapter. The MCP server repository has 126 stars. ### It charges per use and keeps no plans or minimums The pricing page states that there are no plans, seats or minimums. A number costs US$3 a month, voice 13 cents a minute and a text 2 cents a segment, as the company lists. A small credit lets a developer try it first. ## How it was built These details come from the company's own pages and documentation. They are grade C. - Voice and texts use one webhook format. Caller speech is transcribed and sent to the customer's webhook as text, and the reply is spoken by the service. - Each agent has a voice mode. In webhook mode the customer's own model answers. In hosted mode a built-in model follows the agent's system prompt. - The company's blog says the service converts telephone audio to the format that modern speech models expect, so the developer does not write that layer. - US texts need carrier registration under 10DLC. The company says its dashboard guides the filing and that campaigns can be approved within 5 business days. - Billing runs on prepaid credit with optional automatic top-up from a card. The privacy policy says a payment processor handles card data and does not name it. - Sub-accounts give a customer's own clients separate numbers and usage under one bill, as the pricing page states. Sources: [8, 9, 12, 7, 5, 1] ## Who tried this before AgentPhone, and why did they fail? Two companies in our database of failed startups sold phone or text services to businesses and closed. The values below are from that database, were read on 12 November 2026 and are not independently verified. The failed startups come from our database of dead startups, retold here in our own words; Its entries are AI-assisted summaries of public sources, so they carry no evidence grade. ### RingDaddy (2019 to 2021; funding US$3.0M; cause: Product-market fit) - Promise: A no-code tool for marketers to run SMS campaigns for streaming platforms. - Why it died: The record says it suffered mainly from poor market fit, and that text messages carried carrier fees in a crowded SMS market. - Record: ### PhoneSys (2011 to 2014; funding US$5.0M; cause: Competition) - Promise: A cloud phone system on demand for small and medium companies, with little hardware. - Why it died: The record says it lost early momentum through strategic missteps and fierce competition, and could not stand out from rivals. - Record: ## What changed Both records sold phone or text services to businesses, and both name strong competition. The RingDaddy record also names carrier fees on texts as a cost problem. AgentPhone is exposed to the same two pressures: large telephone platforms, and per-text carrier costs that the pricing page passes through at cost. The buyer is different. AgentPhone sells to developers who build AI agents, and its pages describe a one-line setup through MCP and software packages. The sources do not show whether enough developers pay for that to last. ## Can one person copy AgentPhone now? **Verdict: The packaging can be copied; the results are not shown.** A small team can bundle a regulated utility, here phone numbers and texting, for builders of AI agents and charge per use. The sources show a price list and integrations, and they show no revenue. A reader should treat this as a pattern, not as proof that it earns. 1. Pick one channel that AI agents lack, and bundle the vendors a developer would otherwise assemble. 2. Offer a one-line install through MCP and through the platforms where agent builders already work. 3. Price per use, with a small free credit and no minimum. 4. Put the consent and carrier-registration duties of the customer into the terms and the dashboard. **What is still open.** Other channels that agents still lack, for example postal mail, payments to people and video calls. ## How much revenue does AgentPhone make? The numbers, graded A company founded in 2026 by two people, with a public price list and a self-serve sign-up, and no revenue figure | Fact | Value | Grade | Note | Sources | |---|---|---|---|---| | Company | Relay Innovations, Inc., doing business as AgentPhone | C | Named in the terms of service and the privacy policy, both last updated 31 July 2026, with an address in San Francisco, California. | [4, 5] | | Start | 2026, Y Combinator Spring 2026 batch | C | The Y Combinator listing gives Founded 2026, Batch Spring 2026, Status Active and Location San Francisco. | [3] | | Earlier domain | agentphone.to, no later than 29 January 2026 | C | A copy in the Internet Archive of that date has the title Agent Phone – Phone Numbers for AI Agents. The GitHub organization, created 25 February 2026, lists agentphone.to as its email domain. No earlier name or product was found. | [13, 15] | | First copy of the current domain | 15 May 2026 | C | The Internet Archive's oldest capture of agentphone.ai is dated 15 May 2026. The copy shows the Backed by Y Combinator line and a pip install of the agentphone package. | [14] | | Founders and team | 2 founders; team size not published | C | Y Combinator lists Manav Modi as founder and CEO and Meet Modi as founder and CTO. The listing shows one open job, a founding engineer, and no team size. | [3] | | What it sells | Numbers, voice, SMS, MMS, iMessage, RCS and WhatsApp | C | US and Canadian numbers. WhatsApp and RCS are marked Beta on the pricing page, and SIP trunking is marked Request access. A hosted voice mode runs a built-in model, and a webhook mode uses the customer's own model. | [1, 9] | | Prices | US$3 a month per number; 13 cents a minute for voice; 2 cents a text segment | C | The company's pricing page, read on 12 November 2026. A hosted agent costs 22 cents a minute, and iMessage lines start at US$150 a month. | [1] | | How a plan is bought | Get Started buttons; card on file with automatic top-up | C | The pricing page says to add a card after the US$5 credit and that the balance auto-recharges. The billing guide says a new account needs no card for the credit. | [1, 7] | | Users the company names | Teams at Google's Agent Development Kit, Replit, Y Combinator, Sim AI, LangChain and Alchemy | C | The company's launch post on the Y Combinator listing says these teams are already building with AgentPhone. No independent source was found. | [3] | | Security claim | SOC 2 Type I report as of 30 July 2026; Type 2 in progress | C | The company's trust page says the report is shared under NDA. No report was read. | [6] | | Open-source code | 9 repositories; the MCP server has 126 stars | C | GitHub data read on 12 November 2026. The organization was created on 25 February 2026, and the MCP server repository on 26 February 2026. | [15, 16] | | Company blog | 5 posts from 9 April to 29 May 2026 | C | The blog index lists integrations with Google's Agent Development Kit, LangChain and the Chat SDK by Vercel, a comparison with Twilio and one essay. | [10] | How to read this table. Grade C means the company, a directory or a platform page states the value. No value here is grade A or B. A calc value is not used. ## Pricing AgentPhone prices read from the company's pricing page on 12 November 2026 (grade C) | Plan | Per month, billed yearly (US$) | Per month, billed monthly (US$) | Limit | |---|---|---|---| | Phone number, US or Canada | | 3 | per number per month; voice and messaging enabled | | Voice, your agent over webhook | | 0.13 per minute | billed per second; call recording adds 5 a month for the account | | Voice, agent hosted by AgentPhone | | 0.22 per minute | billed per second | | SMS text | | 0.02 per segment | same rate in and out; MMS is 0.03 a message | | iMessage line, inbound only | | 150 | per line per month; a dedicated line that also sends is 250 | | New account credit | | 0 | US$5 starting credit, one time | The page says there are no plans, no seats and no minimums, and every new account starts with US$5 of credit. Carrier surcharges for texts are passed through at cost. Texts to other countries are priced by country. ## When did AgentPhone launch, and how did it grow? Timeline From a first page on another domain in January 2026 to a priced, self-serve product in November 2026. - **29 January 2026** (grade C [13]): A copy of agentphone.to in the Internet Archive shows the title Agent Phone – Phone Numbers for AI Agents. - **25 February 2026** (grade C [15, 16]): The GitHub organization AgentPhone-AI is created. Its MCP server repository follows on 26 February 2026. - **9 April 2026** (grade C [10]): The oldest post on the blog announces the integration with Google's Agent Development Kit. - **15 May 2026** (grade C [14]): The oldest Internet Archive capture of agentphone.ai shows the Backed by Y Combinator line and the pip install command. - **30 July 2026** (grade C [6, 4]): The date of the SOC 2 Type I report. The terms of service and privacy policy are updated the next day. - **12 November 2026** (grade C [1]): The pricing page lists usage prices for numbers, voice, texts and iMessage lines, with a US$5 credit for new accounts. ## What could go wrong for AgentPhone? - **What is not verified.** No revenue figure was found, so the story is grade E. The home page, pricing page, documentation, terms, blog and Y Combinator listing were read. A reader could look for a press interview or a payment-processor profile. No source states that a customer has paid, and the named users are the company's own statement. The team size and the funding amount are not published. The search service was unavailable on 12 November 2026, so press was not searched. - **Consent and AI disclosure rest with the customer.** The terms forbid sending "unsolicited marketing calls or messages", and they ask each customer to obtain consent. The documentation says a first text must name the brand, confirm the opt-in and give opt-out instructions. The pages read set no rule that an agent must say it is an AI. The home page shows one agent that opens with "this is John’s AI agent". Its sales example opens with "this is Robin calling on behalf of Lantern". The documentation's example greeting is "Hi, this is Acme Corp calling about your recent order". Its settings list ambient sound and backchannel cues. The company's blog of 18 April 2026 describes agents that call new leads within seconds and survey calls to 500 customers. No mention of voice cloning was found on the pages and documentation read, including the API description. The messaging policies page loads by script and could not be read. - **The home page shows a logo row that no second source explains.** A row headed "Across the agent ecosystem" shows the logos of Stripe, Replit, Alchemy, Google, LangChain, Sim, Vercel and Y Combinator. The Google, Sim and Vercel links lead to integration pages. The LangChain link led to a provider overview that does not name AgentPhone. The page also shows a SOC 2 Type I badge, and no testimonials were found. - **Most of the product is telephone service for other people's agents.** The built-in model exists only in hosted voice mode. In webhook mode the customer's own model answers, and the service handles numbers, transcription and speech. The terms forbid reselling raw access to numbers, voice or messaging without a written reseller agreement. They also say the numbers cannot reach emergency services. ## Sources 1. AgentPhone pricing page — https://agentphone.ai/pricing (grade C). Read in full on 12 November 2026. Source for the price list, the credit, the Beta labels and the sub-accounts. 2. AgentPhone home page — https://agentphone.ai/ (grade C). Read in full on 12 November 2026. Source for the product description, the webhook, the logo row and the demo calls. 3. Y Combinator company page: AgentPhone — https://www.ycombinator.com/companies/agentphone (grade C). Read in full on 12 November 2026. Source for the founders, the batch, the year, the launch post and the open job. 4. AgentPhone terms of service, last updated 31 July 2026 — https://agentphone.ai/terms (grade C). Read in full on 12 November 2026. Source for the company name, the acceptable-use rules and the consent duties. 5. AgentPhone privacy policy, last updated 31 July 2026 — https://agentphone.ai/privacy (grade C). Read in full on 12 November 2026. Source for the company name and the payment processor line. 6. AgentPhone trust and security page — https://agentphone.ai/trust (grade C). Read in full on 12 November 2026. Source for the SOC 2 Type I date. 7. AgentPhone documentation: Usage and billing — https://docs.agentphone.ai/usage.md (grade C). Read in full on 12 November 2026. Source for pay-as-you-go billing, the credit and auto-recharge. 8. AgentPhone documentation: Calls — https://docs.agentphone.ai/documentation/guides/calls.md (grade C). Read in full on 12 November 2026. Source for the voice modes, the webhook flow and the outbound greeting example. 9. AgentPhone documentation: Agents — https://docs.agentphone.ai/documentation/guides/agents.md (grade C). Read in full on 12 November 2026. Source for the hosted and webhook voice modes and the voice settings. 10. AgentPhone blog index — https://agentphone.ai/blog (grade C). Read in full on 12 November 2026. Source for the five posts and their dates. 11. AgentPhone blog, 18 April 2026: Why Every AI Agent Needs a Phone Number — https://agentphone.ai/blog/why-every-agent-needs-a-phone-number (grade C). Read in full on 12 November 2026. The company's own essay. Source for the MCP tools and the lead-call examples. 12. AgentPhone blog, 24 April 2026: Twilio vs. AgentPhone — https://agentphone.ai/blog/twilio-vs-agentphone (grade C). Read in full on 12 November 2026. The company's own comparison. Source for the bundling claim, the audio conversion and 10DLC. 13. Internet Archive copy of agentphone.to, 29 January 2026 — https://web.archive.org/web/20260129151432/https://agentphone.to/ (grade C). Read the copy on 12 November 2026. The page loads by script, so only its title and description were readable. 14. Internet Archive capture list and copy of agentphone.ai, 15 May 2026 — https://web.archive.org/web/20260515235136/https://www.agentphone.ai/ (grade C). Read the copy and the capture list on 12 November 2026. The oldest capture is 15 May 2026. 15. GitHub organization AgentPhone-AI — https://api.github.com/orgs/AgentPhone-AI (grade C). Read the API record on 12 November 2026. Source for the creation date of 25 February 2026 and the email domain. 16. GitHub repositories of AgentPhone-AI — https://api.github.com/orgs/AgentPhone-AI/repos?per_page=20 (grade C). Read the API record on 12 November 2026. Source for the nine repositories and the star count of the MCP server. 17. Chat SDK by Vercel: AgentPhone adapter — https://chat-sdk.dev/adapters/vendor-official/agentphone (grade C). Read in full on 12 November 2026. A platform page that lists the adapter. 18. AgentPhone book a demo page — https://agentphone.ai/demo (grade C). Read in full on 12 November 2026. A booking page for a call with the team, offered next to the self-serve sign-up. 19. Database of failed startups, local export — /method/#dead (grade C). Record pages and the site map read on the website on 12 November 2026. AI-written summaries, not independently verified. 20. AgentPhone documentation: Messaging rate limits — https://docs.agentphone.ai/documentation/reference/messaging-rate-limits.md (grade C). Read in full on 12 November 2026. Source for the brand name, opt-in and opt-out rule of a first text. Contact: aiolum@livyden.com. Run AgentPhone? Send corrections or a verified figure to aiolum@livyden.com (subject: Correction: AgentPhone).