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Automated best-of radar

Best Free Speech-to-text options.

Candidates with a source-backed free tier, free endpoint, free trial, pretrained download, open weights, open-source license, or self-hosted path. Automated radar ranking for ASR, transcription, diarization, and real-time speech-to-text models and APIs. Rankings use existing source-backed radar data and do not invent prices, benchmark scores, release dates, or capabilities.

Candidates
9
matched automatically
Top fit
100
AssemblyAI Speech-to-Text
Sources
17
canonical links retained
Access
Free/open
filtered automatically
Updated
Jun 27, 2026
listed in sitemap
All14Free/open9Paid API11Open source3
Best overall radar pick

AssemblyAI Speech-to-Text

Highest automated fit score using source-backed task evidence and radar signals.

RDR100serviceAssemblyAI
Best API or hosted option

AssemblyAI Speech-to-Text

Strong candidate when the source metadata indicates API or hosted-service availability.

RDR100serviceAssemblyAI
Best open-source option

NVIDIA Riva

Strong candidate when open weights, GitHub, permissive license, or self-hosting signals are visible.

RDR85serviceNVIDIA
Best developer momentum

AssemblyAI Speech-to-Text

Strong candidate with fresh GitHub, Hub, Product Hunt, or radar momentum.

RDR100serviceAssemblyAI
#CandidateTypeAccessSourceFitUpdatedWhy it matchedEvidence
01AssemblyAI Speech-to-TextAssemblyAI API serviceservicePaid APIOfficial service pageRDR100Jun 26, 2026Matched speech-to-text, speech to text, stt; 2 source links; official service signal; access model: Paid APIassemblyai.com
02Azure AI SpeechMicrosoft Azure API serviceservicePaid APIOfficial service pageRDR100Jun 26, 2026Matched speech-to-text, speech to text, asr; 3 source links; official service signal; access model: Paid APIlearn.microsoft.com
03Amazon TranscribeAWS API serviceservicePaid APIOfficial service pageRDR100Jun 26, 2026Matched speech-to-text, speech to text, stt; 1 source link; official service signal; access model: Paid APIaws.amazon.com
04ElevenLabs Speech to TextElevenLabs API serviceservicePaid APIOfficial service pageRDR99Jun 26, 2026Matched speech-to-text, speech to text, stt; 1 source link; official service signal; access model: Paid APIelevenlabs.io
05Deepgram Speech AIDeepgram API serviceservicePaid APIOfficial service pageRDR86Jun 26, 2026Matched speech-to-text, speech to text, asr; 2 source links; official service signal; access model: Paid APIdeepgram.com
06Cartesia Voice APICartesia API serviceservicePaid APIOfficial service pageRDR86Jun 26, 2026Matched speech-to-text, speech to text, stt; 2 source links; official service signal; access model: Paid APIdocs.cartesia.ai
07NVIDIA RivaNVIDIA API serviceservicePaid APIOfficial service pageRDR85Jun 26, 2026Matched speech-to-text, speech to text, asr; 2 source links; official service signal; access model: Paid APIdeveloper.nvidia.com
08NVIDIA NIM Model CatalogNVIDIA inference platformserviceFree endpointOfficial inference catalogRDR78Jun 26, 2026Matched speech-to-text, speech to text; 3 source links; official inference catalog signal; access model: Free endpointbuild.nvidia.com
09screenpipe/screenpipeRust repositoryrepoOpen sourceGitHubRDR73Jun 27, 2026Matched speech-to-text, speech to text; 1 source link; access model: Open source; freshly updatedgithub.com

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