# Pulse — Speech-to-Text by Smallest AI

Source: https://freeaidirectories.com/tools/pulse-speech-to-text-by-smallest-ai

Real-time speech-to-text API with sub-100ms latency, diarization, and PII redaction.

## About Pulse — Speech-to-Text by Smallest AI

Pulse is Smallest AI's speech-to-text API, built for real-time voice applications like voice agents, live call transcription, and captioning, alongside a high-throughput batch mode for recorded audio. It streams over WebSocket with sub-100ms time-to-first-token at low concurrency, and includes speaker diarization, word- and sentence-level timestamps, keyword boosting for up to 10,000 custom terms, voice-activity events, and automatic inverse text normalization.

Pulse supports 21 languages on streaming and 26 on batch, with regional auto-detect and mid-session code-switching. A companion model, Pulse Pro, trades multilingual support for English-only batch transcription tied for #2 on the public Open ASR Leaderboard, built for high-volume call center, meeting, and financial-audio transcription.

Both models include built-in PII and PCI redaction (currently English and Hindi), plus optional emotion and gender detection on batch jobs. The platform holds ISO 27001, SOC 2 Type II, HIPAA, and GDPR compliance, with on-premise deployment available on Enterprise plans.

Common use cases: live voice agents and conversational AI, call center and contact center analytics, meeting and financial-audio transcription, multilingual customer support, and compliance-sensitive workflows requiring redaction.

## Details

- Website: https://smallest.ai/speech-to-text?utm_campaign=pulse-speech-to-text-by-smallest-ai&utm_source=freeaidirectories.com&utm_medium=listing
- Category: [AI Agents](https://freeaidirectories.com/categories/ai-agents)
- Also in: [Audio & Music](https://freeaidirectories.com/categories/audio-music), [Transcription & Notes](https://freeaidirectories.com/categories/transcription-notes)
- Pricing: Freemium
- Added: 2026-09-23
- Social: [X](https://x.com/smallest_AI), [LinkedIn](https://linkedin.com/company/smallest), [YouTube](https://youtube.com/@smallest_ai)

## Key features

- Sub-100ms streaming transcription latency
- 21+ languages across streaming and batch
- Built-in speaker diarization and timestamps
- Automatic PII/PCI redaction (English, Hindi)
- Pulse Pro: #2 on Open ASR Leaderboard

## Frequently asked questions

### What is Pulse — Speech-to-Text by Smallest AI?
Real-time speech-to-text API with sub-100ms latency, diarization, and PII redaction.

### Is Pulse — Speech-to-Text by Smallest AI free?
Pulse — Speech-to-Text by Smallest AI has a free tier, with paid plans for more features.

### What are the best alternatives to Pulse — Speech-to-Text by Smallest AI?
Popular alternatives include [DeVoice - Free AI Audio & Video Transcription](https://freeaidirectories.com/tools/devoice-free-ai-audio-video-transcription), [Transcribe Audio to Text with AI](https://freeaidirectories.com/tools/transcribe-audio-to-text-with-ai) and [Parall](https://freeaidirectories.com/tools/parall). [See all 153 Pulse — Speech-to-Text by Smallest AI alternatives](https://freeaidirectories.com/tools/pulse-speech-to-text-by-smallest-ai/alternatives).

### What category is Pulse — Speech-to-Text by Smallest AI in?
Pulse — Speech-to-Text by Smallest AI is in the [AI Agents](https://freeaidirectories.com/categories/ai-agents) category.

## Pulse — Speech-to-Text by Smallest AI alternatives

- [DeVoice - Free AI Audio & Video Transcription](https://freeaidirectories.com/tools/devoice-free-ai-audio-video-transcription): ai transcriber, ai translator, audio enhancer (Freemium · Productivity)
- [Transcribe Audio to Text with AI](https://freeaidirectories.com/tools/transcribe-audio-to-text-with-ai): Transcribe Audio to Text with AI for Free | AudioTranscription.io (Freemium · Audio & Music)
- [Parall](https://freeaidirectories.com/tools/parall): The office for your AI team. (Freemium · AI Agents)
- [SeeleAgent](https://freeaidirectories.com/tools/seeleagent): Multimodal AI agent for games, images, video, 3D assets and code. (Freemium · AI Agents)
- [Chatxy](https://freeaidirectories.com/tools/chatxy): Free Unlimited AI Chat — ChatGPT, Claude, Gemini, Grok & DeepSeek in One Place (Freemium · AI Agents)
- [WEXTL](https://freeaidirectories.com/tools/wextl): AI powered automation workflows that actually get work done (Freemium · AI Agents)

[See all 153 Pulse — Speech-to-Text by Smallest AI alternatives](https://freeaidirectories.com/tools/pulse-speech-to-text-by-smallest-ai/alternatives)

Updated: 2026-09-23