RESA AI
RESA AI is an AI-powered phone receptionist built for small businesses, founded by Zhaoyu "Jerry" Wu and Tanmay Kejriwal.2 The company participated in the [Ship It] program at Founders, Inc. from February 24 to March 21, 2025, where it was among 60+ teams that flew to San Francisco to build at the Fort Mason campus.110 The product's tagline is "Never miss a call, never miss a sale."1
Product
RESA AI provides businesses with an AI voice assistant that answers phone calls around the clock, handling tasks including booking appointments, taking payments, and responding to customer inquiries.2 The system can handle multiple simultaneous calls, so callers never encounter a busy signal or hold queue.2 It supports 85+ languages and averages under 900 milliseconds of response time, according to the company's website.2
The product integrates with Cal.com for appointment scheduling, Square and Toast for point-of-sale operations, Stripe for payments, Twilio for telephony, and OpenAI for language model capabilities.2 The company's website also lists LiveKit, the open-source real-time communication platform in the Founders, Inc. portfolio, as a technology partner.211
Setup requires three steps: creating an account and selecting a phone number, uploading business information and integrating with a POS system, and linking the new number to a Google Business Profile.2 The service offers two pricing tiers: a Starter plan at $99 per month with 300 included call minutes, and a Premium plan at $199 per month with 1,000 minutes, POS integration, reservation management, and interruptable conversations.2 Additional usage is billed at $0.15 per minute, which the company compares to $0.50 to $1.00 per minute at competitors.2
Founders
Both founders attended Texas Christian University.45 Both list their current role as a stealth startup on LinkedIn.45
Zhaoyu "Jerry" Wu previously founded Redbird, a SaaS point-of-sale platform that he exited.4 A Flippa listing for redbirdtab.com describes the product as a "Profitable 86% margin SaaS POS platform with real customers" with an average monthly profit of $1,086.9 Wu's LinkedIn profile describes him as a "CMU Dropout" and a Nova member, based in San Francisco.4
Tanmay Kejriwal is a software engineer from New Delhi who studied computer science at Texas Christian University after switching from mechanical engineering.127 At TCU, he and a classmate built Editify, a Shopify app that allowed merchants to backdate orders; the app grew to 300 users organically through the Shopify App Store and was later sold on Acquire.com.8 Kejriwal had previously sold a smaller SaaS product through the same platform.8 Before RESA AI, he worked as a software engineer at Dimensional Fund Advisors, building systems with Angular, Django, React, PostgreSQL, and RabbitMQ.6 He also founded MakeX, a no-code platform that converts plain-English prompts into functional iOS apps; it generated over 2,500 apps for 600+ users and was featured by Founder University.78
Ship It program
RESA AI was one of the companies listed in the [Ship It] Demo Day Directory, the culmination of Founders, Inc.'s four-week sprint program in February and March 2025.1 The directory entry identifies the founders as "Zhaouyu Wu(Jerry); Tanmay Kejriwal" and includes a link to the company's website and a demo video.1 The [Ship It] program selected 50 teams and brought 60+ builders to the Fort Mason campus, with $1 million allocated for investments in standout companies.10
Other companies in the same cohort included Vaidya Surgical (autonomous surgical robots), Cheforge (AI-powered cooking robots), AgentX (no-code AI agent builder), and Zuko AI (AI receptionist for appointment scheduling) -- another voice AI product competing in the same space as RESA AI.1 F.inc summarized the cohort's outcome: "Some of them got funding. All of them got motion towards what they were building."1
As of April 2026, RESA AI does not appear on the Founders, Inc. portfolio page, which lists companies that received investment from the firm.11 The f.inc portfolio does include PieLine, described as "24/7 AI Phone Answering," a product in the same category as RESA AI.11
Pivot history
The company's privacy policy, last updated December 20, 2025, describes the product as a "syllabus-to-calendar conversion service" and lists the company address as 131 Continental Drive, Newark.3 This description does not match the current product, which is an AI phone receptionist, suggesting that the company pivoted from an education-focused tool to a voice AI platform at some point before or during the [Ship It] program.32