Hyperbound Raises $15M Series A and Expations with Enterprise Partnerships

San Francisco-based sales technology provider Hyperbound raised a $15 million Series A round led by Peak XV Partners, with participation from Y Combinator, Snowflake Ventures, Roble Ventures, and Fellows Fund. As reported by Yahoo Finance and The Economic Times, the Series A brings the company's total funding to $18.3 million. Hyperbound reached $1 million in new annual recurring revenue for two consecutive months, scaling its enterprise customer base to include LinkedIn, Monday.com, Autodesk, Vanta, Tipalti, G2, Bloomberg, Airwallex, Notion, IBM, and JumpCloud.

In September 2026, global sales training provider Richardson announced AI Roleplay Built on Hyperbound inside its Accelerate Prism platform, according to aap.com.au. The integration allows revenue teams to embed customized practice scenarios directly into sales training programs, evaluating seller performance against Consultative Selling and Challenger methodologies.

Simulating Buyer Personas with Voice AI

Founded in 2023 out of Y Combinator's S23 batch, Hyperbound builds a revenue activation platform focused on voice-driven sales roleplays and real-time call coaching. The platform uses simulated AI buyers customized to a customer's ideal client profile, allowing sales reps to practice prospecting, discovery, pricing negotiation, and objection handling. Hyperbound's technology maintains voice conversation latencies below 800 milliseconds and supports more than 25 languages, including multiparty simulations with several buyer personas.

Beyond call practice, Hyperbound inspects live calls, scores conversations against custom scorecards, and delivers automated feedback to address performance gaps. The system uses a dual backend architecture composed of FastAPI in Python and NestJS in TypeScript, paired with PostgreSQL, AWS, and Azure infrastructure. The frontend is built with React and Next.js.

Founder Backgrounds

Hyperbound was co-founded by Sriharsha Guduguntla and Atul Raghunathan.

• Sriharsha Guduguntla, CEO, is a full-stack engineer and designer who graduated from UC Berkeley with a degree in computer science. He previously conducted research at the UC Berkeley RISE Lab, built conversational features for Salesforce Einstein, worked as a founding engineer at Bloom (YC W21), and co-founded Calypso.
• Atul Raghunathan, CTO, holds an M.S. in Computer Science with a concentration in Machine Learning from Carnegie Mellon University. Before founding Hyperbound, he worked on the Meta Ads core machine learning team building enterprise personalization systems.

Speaking on The CRO Collective podcast, Guduguntla explained that Hyperbound evolved from early prospecting roleplay bots into a full-cycle coaching partner that rides along on pre-call prep, live calls, and post-call debriefs. On Chris Bussing's channel, Guduguntla and Raghunathan noted that larger enterprise deployments can onboard thousands of reps simultaneously without manual dashboard setups. In an interview on Uncapped Consulting, Raghunathan highlighted that the company's skill gap detection engine allows managers to pinpoint deal risks and deliver just-in-time practice scenarios directly before reps join key prospect calls.

Expanding Engineering and Commercial Teams

Hyperbound grew from 15 employees to over 50 team members following its Series A funding and is actively hiring in San Francisco across engineering, marketing, and sales.

On the product development side, Hyperbound is recruiting a Senior Full-Stack Engineer, Product to build AI-native software incorporating GraphRAG, context graphs, sub-agent architectures, voice models, MCP, and multimedia processing. The role requires five days a week in the San Francisco office.

To drive market expansion, the company is hiring a Head of Growth to manage paid acquisition, organic channels, lifecycle marketing, and integrated campaigns onsite five days a week. The marketing team is also seeking a Field Marketer to execute tradeshows, partner dinners, and events, as well as a Creative Video Producer / Motion Designer to create video assets covering products and customer case studies.

Within the revenue organization, Hyperbound is adding an Enterprise Account Executive to handle full-cycle deals ranging from $100,000 to multi-six-figure annual contract values with customer travel. Additionally, the company is hiring a Mid Market Account Executive, Existing Business to manage existing mid-market accounts and drive upsells in-office five days a week.

Open Roles at Hyperbound

See all open roles at Hyperbound