Comparison
fastrtc vs RealtimeTTS
Verdict
Pick fastrtc when fastrtc is primarily JavaScript; RealtimeTTS is Python; pick RealtimeTTS when realtimeTTS is primarily Python; fastrtc is JavaScript.
Markdown twin · fastrtc alternatives · RealtimeTTS alternatives
GraphCanon updated Sep 20, 2026
13views this month
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Trust & integrity
| Signal | fastrtc | RealtimeTTS |
|---|---|---|
| Maintenance | Slowing (250d since push) As of Sep 20, 2026 · github_public_v1 | Very active (0d since push) As of Sep 20, 2026 · github_public_v1 |
| Provenance | Not a fork · Organization account As of Sep 20, 2026 · github_public_v1 | Not a fork · Personal account As of Sep 20, 2026 · github_public_v1 |
| OSV dependency advisories | No lockfile (source not queried) As of Jul 11, 2026 · osv@v1 | No published findings from this source as of 2026-07-11 As of Jul 11, 2026 · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- fastrtc
- The python library for real-time communication
- RealtimeTTS
- Converts text to speech in realtime
Stars
- fastrtc
- 4.6k
- RealtimeTTS
- 4.0k
Forks
- fastrtc
- 435
- RealtimeTTS
- 405
Open issues
- fastrtc
- 82
- RealtimeTTS
- 127
Language
- fastrtc
- JavaScript
- RealtimeTTS
- Python
Adopt for
- fastrtc
- fastrtc is a Python library offering real-time communication capabilities such as pause detection and text-to-speech.
- RealtimeTTS
- -
Persona
- fastrtc
- -
- RealtimeTTS
- -
Runtime
- fastrtc
- -
- RealtimeTTS
- -
License
- fastrtc
- MIT
- RealtimeTTS
- MIT
Last pushed
- fastrtc
- Jan 12, 2026
- RealtimeTTS
- Sep 19, 2026
Categories
- fastrtc
- Speech & Audio
- RealtimeTTS
- Speech & Audio
Trust and health
Maintenance
- fastrtc
- Slowing (36%)
- RealtimeTTS
- Very active (96%)
Days since push
- fastrtc
- 250d
- RealtimeTTS
- 0d
Open issues (now)
- fastrtc
- 82
- RealtimeTTS
- 127
Stars delta
- fastrtc
- +5 (30d)
- RealtimeTTS
- +29 (30d)
Open issues delta
- fastrtc
- +3 (30d)
- RealtimeTTS
- +2 (30d)
Owner type
- fastrtc
- Organization
- RealtimeTTS
- User
OSV dependency advisories
- fastrtc
- No lockfile (source not queried)
- RealtimeTTS
- No published findings from this source as of 2026-07-11
Full report
- fastrtc
- Trust report
- RealtimeTTS
- Trust report
Shared compatibility
- Python · fastrtc: Python runtime · RealtimeTTS: Python runtime
Choose fastrtc if…
- fastrtc is primarily JavaScript; RealtimeTTS is Python.
- Tags unique to fastrtc: artificial-intelligence, hacktoberfest, hacktoberfest2025, llm.
- Use fastrtc for projects that require pause detection in audio streams as it provides the specific ReplyOnPause feature.
When NOT to use fastrtc
- Avoid fastrtc when the project requires real-time communication features not covered by its pause detection or text-to-speech services.
- Do not use fastrtc if support for multiple languages beyond what Python and this library's built-in features provide is necessary.
Choose RealtimeTTS if…
- RealtimeTTS is primarily Python; fastrtc is JavaScript.
- Tags unique to RealtimeTTS: realtime, speech-synthesis.
- Use RealtimeTTS when you need to integrate real-time text-to-speech capabilities into a Python application that requires immediate audio output without delays.
When NOT to use RealtimeTTS
- Avoid using RealtimeTTS in scenarios where pre-recorded or highly customized voice outputs are crucial, given its focus on speed over customization options.
- Do not use RealtimeTTS if heavy reliance on external cloud services is a requirement, since it emphasizes local execution for performance.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (gradio-app/fastrtc) · observed Sep 20, 2026
- GitHub forks (gradio-app/fastrtc) · observed Sep 20, 2026
- Last push (gradio-app/fastrtc) · observed Jan 12, 2026
- License file (MIT) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 17, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (KoljaB/RealtimeTTS) · observed Sep 20, 2026
- GitHub forks (KoljaB/RealtimeTTS) · observed Sep 20, 2026
- Last push (KoljaB/RealtimeTTS) · observed Sep 19, 2026
- License file (MIT) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 16, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: fastrtc 4.6k · RealtimeTTS 4.0k (synced Sep 20, 2026).
Common questions
- What is the difference between fastrtc and RealtimeTTS?
- fastrtc: The python library for real-time communication. RealtimeTTS: Converts text to speech in realtime. See the comparison table for live GitHub stats and shared categories.
- When should I choose fastrtc over RealtimeTTS?
- Choose fastrtc over RealtimeTTS when fastrtc is primarily JavaScript; RealtimeTTS is Python; Tags unique to fastrtc: artificial-intelligence, hacktoberfest, hacktoberfest2025, llm; Use fastrtc for projects that require pause detection in audio streams as it provides the specific ReplyOnPause feature.
- When should I choose RealtimeTTS over fastrtc?
- Choose RealtimeTTS over fastrtc when RealtimeTTS is primarily Python; fastrtc is JavaScript; Tags unique to RealtimeTTS: realtime, speech-synthesis; Use RealtimeTTS when you need to integrate real-time text-to-speech capabilities into a Python application that requires immediate audio output without delays.
- When should I avoid fastrtc?
- Avoid fastrtc when the project requires real-time communication features not covered by its pause detection or text-to-speech services. Do not use fastrtc if support for multiple languages beyond what Python and this library's built-in features provide is necessary.
- When should I avoid RealtimeTTS?
- Avoid using RealtimeTTS in scenarios where pre-recorded or highly customized voice outputs are crucial, given its focus on speed over customization options. Do not use RealtimeTTS if heavy reliance on external cloud services is a requirement, since it emphasizes local execution for performance.
- Is fastrtc or RealtimeTTS more popular on GitHub?
- fastrtc has more GitHub stars (4,624 vs 4,031). Stars measure visibility, not whether either tool fits your constraints.
- Are fastrtc and RealtimeTTS open source?
- Yes - both are open-source projects on GitHub (fastrtc: MIT, RealtimeTTS: MIT).
- Where can I find alternatives to fastrtc or RealtimeTTS?
- GraphCanon lists graph-backed alternatives at fastrtc alternatives and RealtimeTTS alternatives (fastrtc markdown twin, RealtimeTTS markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, fastrtc or RealtimeTTS?
- fastrtc: Slowing. RealtimeTTS: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for fastrtc and RealtimeTTS?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: fastrtc trust report; RealtimeTTS trust report.