Funding · AI & Deep Tech

Smallest.ai raises $13 Mn in Series A led by Seligman Ventures

By Startup Enthusiast · 1 August 2026

What they do

Smallest.ai builds voice AI models for financial services, healthcare, contact centres and BPOs

The startup raised $13 Mn in Series A, bringing total capital raised to over $21 Mn

It plans to scale its platform using in-house architecture called Hydra, which processes listening, reasoning and speech generation in parallel

Smallest.ai, a voice AI startup, raised $13 Mn in its Series A funding round led by Seligman Ventures.
Existing backers Sierra Ventures and 3one4 Capital also participated in the round.
The startup plans to use the funds to scale its voice AI platform for clients in financial services, healthcare, contact centres and BPOs.
Smallest.ai announced the launch of ‘Voice 4.0’, a tech framework powered by its in-house architecture called Hydra.
Hydra handles listening, reasoning and speech generation in parallel, unlike traditional voice systems that process tasks sequentially.
The startup has raised more than $21 Mn to date, with its previous $8 Mn seed round led by Sierra Ventures in October 2025.

Voice AI is a growing segment as enterprises seek to streamline operations and improve customer experience.
Smallest.ai’s platform includes two major voice models: Pulse STT Pro (speech-to-text) and Lightning V3.1 (text-to-speech).
The models support 38 languages and include features like speaker diarisation, emotion detection and code-switching.
Smallest.ai counts clients like TrueCaller, Readymode, Premal and Pocket.

Smallest.ai provides a voice AI platform that includes speech-to-text and text-to-speech models.
The platform is designed to automate complex workflow operations for enterprises.
It supports 38 languages and includes features like speaker diarisation, emotion detection and code-switching.
The startup’s models are built on in-house architecture called Hydra, which processes listening, reasoning and speech generation in parallel.
Smallest.ai’s clients include TrueCaller, Readymode, Premal and Pocket.

Seligman Ventures (lead) — Venture capital firm focused on early-stage technology startups.
Sierra Ventures (existing) — Venture capital firm with a focus on AI and enterprise software.
3one4 Capital (existing) — Venture capital firm investing in early-stage technology startups.

Product: Voice AI software for real-time speech recognition, understanding and synthesis.
Customers: Enterprises in financial services, healthcare, contact centres and BPO.
How it makes money: B2B software platform sold to enterprise customers.
What sets it apart: Low-latency voice stack with proprietary Hydra architecture.
Operations: Operates from San Francisco and Bengaluru, with customers across North America and India.