What is Piper?
Open-source software that converts text to speech using neural networks, optimized to run locally for fast inference without requiring external services
Piper pricing
We don't have Piper's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
Free and open source
Platform & deployment
Independently observed- Self-hosted
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
Piper alternatives
Other text to speech we track, ranked by the same independent score.
- Murf AIAI platform for generating natural-sounding voiceovers and conversational voice agentsmedium · 53%
- ElevenLabsAI-powered voice technology platform for generating speech, creating voice agents, and producing audio contentlow · 43%
- Amazon PollyCloud-based text-to-speech service that converts written content into natural-sounding spoken audiomedium · 61%
- eSpeak NGlow · 26%
- WellSaid LabsGenerate professional-quality AI voiceovers from text using realistic voices modeled from professional voice actorslow · 44%
- Coqui TTSlow · 20%
Compare Piper
Side by side against other text to speech, attribute by attribute, with a source on every value.
The Vioscale score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Piper, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Pricing transparency | 80 | 0.08 | 6.7 | ✓ |
| Price level | 100 | 0.05 | 5.2 | ✓ |
| Release cadence | 63 | 0.05 | 3.3 | ✓ |
| Stars | 76 | 0.03 | 2.0 | ✓ |
| Reliability | 0 | 0.07 | 0.0 | - |
| Capabilities | 0 | 0.08 | 0.0 | - |
| Integrations | 0 | 0.09 | 0.0 | - |
| Dependent projects | 0 | 0.06 | 0.0 | ✓ |
| Development activity | 0 | 0.09 | 0.0 | ✓ |
| Security posture | 0 | 0.07 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Security score | 0 | 0.04 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 0 | mediumsource · 2026-08-26 · 65% |
Adoption
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | C++ | highsource · 2026-08-26 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | MIT | highsource · 2026-08-26 · 95% |
Pricing
Release
Security
| Attribute | Value | Evidence |
|---|---|---|
| Vulnerabilities | Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Frhasspy%2Fpiper&per_page=100 · Last 12m: 0 | highsource · 2026-08-26 · 90% |