Kokoro vs Piper
Both are alternatives to ElevenLabs. Here's how they stack up — verified facts, no spin.
Also searched as Piper vs Kokoro — same comparison, one verdict.
Kokoro
TOP PICK82M parameters, Apache-2.0, and the top of the TTS leaderboard.
Kokoro is a remarkably small open text-to-speech model — around 82 million parameters and a roughly 300MB footprint — that nonetheless ranks at the top of the TTS Arena leaderboard. It is released under Apache-2.0, so commercial use is free and unencumbered. Because it is small it runs faster than real time on modest hardware, including a cheap rented GPU, which makes it the most practical drop-in replacement for a per-character API for most teams.
Piper
30+ languages on hardware as small as a Raspberry Pi.
Piper is a fast, local neural text-to-speech system built for constrained hardware — it runs comfortably on a Raspberry Pi and powers the voice in several self-hosted home-automation stacks. It covers 30+ languages with a large library of pre-trained voices. Quality does not match Kokoro or ElevenLabs, but nothing else runs this well with this little silicon.
Side by side
| Kokoro | Piper | |
|---|---|---|
| Sovereignty Score | 94 | 90 |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Local-first | Yes | Yes |
| License | Apache-2.0 | GPL-3.0 |
| Pricing | Free — weights are Apache-2.0. Costs are hardware only; a rented GPU capable of faster-than-real-time synthesis runs roughly $20–$80/month, and nothing at all if you already own a suitable card. | Free — GPL-3.0. Runs on CPU, including single-board computers; effectively costs electricity. |
Kokoro is Macrostack's recommended ElevenLabs alternative, so it's our pick here.
Kokoro
Strengths
- +Apache-2.0 — commercial use with no restrictions
- +Tiny: ~300MB, runs faster than real time on modest hardware
- +Ranks top of the TTS Arena leaderboard despite its size
- +No per-character billing — cost stops scaling with usage
Trade-offs
- −No built-in voice cloning — you use the voices it ships with
- −Fewer languages than ElevenLabs' multilingual models
- −You own the deployment, updates, and uptime
Piper
Strengths
- +Runs on very low-power hardware, including a Raspberry Pi
- +30+ languages with a large pre-trained voice library
- +Fully offline — nothing leaves the device
- +Proven in production inside self-hosted voice assistants
Trade-offs
- −GPL-3.0 is copyleft — commercially usable, but check it against how you distribute
- −Noticeably behind Kokoro and ElevenLabs on naturalness
- −No voice cloning
More ElevenLabs head-to-heads
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Facts verified 2026-07-29. Licenses and pricing change — spotted something out of date? That's a correction we want.