Fish Audio alternatives in 2026: ElevenLabs, AssemblyAI and more
Fish Audio is facing closer scrutiny from developers comparing text-to-speech options on pricing, concurrency and production readiness, with a 2026 roundup highlighting ElevenLabs, AssemblyAI and other alternatives. The comparison matters because the trade-offs are not limited to voice quality: they also include billing units, data residency, cloning features and limits on simultaneous requests, according to the source article published Nov. 3, 2026.
Evidence and context
The article says Fish Audio’s appeal is strongest for developers who liked its pricing but are now running into production constraints, including a concurrency cap tied to prepaid spend, US-only default data handling and an enterprise security story still in progress. It also notes that Fish Audio was founded in 2025, its SOC 2 Type II audit is in progress and its enterprise uptime SLA is 99%.
At a glance, the article lists Fish Audio S2.1 Pro at $15 per 1 million UTF-8 bytes, while AssemblyAI-TTS-1 is priced at $15 per 1 million characters, ElevenLabs v4 Turbo and Flash v2.5 at $0.04 per 1,000 characters, Cartesia Sonic 3.6 on credit plans from $5 per month to $299 per month, and Inworld TTS-2 and TTS-2 Flash at $25 and $15 per 1 million characters on demand. The article also includes open-weight options such as Kokoro and Chatterbox, which it describes as free to run but dependent on the user’s own GPU and operations time.
A footnote in the comparison says Fish bills per 1 million UTF-8 bytes, while AssemblyAI, ElevenLabs, Cartesia and Inworld bill per character. It adds that accented characters in Spanish, French, German or Portuguese count as two UTF-8 bytes on Fish, meaning the listed $15 per 1 million on Fish and AssemblyAI does not represent the same spend for plain English text.
Why developers are switching
The article identifies two main groups searching for Fish Audio alternatives. Creators are comparing Fish with ElevenLabs for voiceovers, character voices and narration. Developers, by contrast, are focused on production constraints.
For concurrency, the article says Fish Audio allows five concurrent requests until $100 has been prepaid, 15 until $1,000 has been prepaid and 50 after that, with higher limits available by enterprise contract. It notes that for a voice agent, every active call occupies a slot while it speaks. It also says Fish keeps data in the US by default, with inference in the US and Tokyo, and that some models, including Drama 3 and Fish’s realtime speech-to-text model, are still in preview.
Fish Audio versus ElevenLabs
The article presents Fish Audio and ElevenLabs as the most common comparison. It says Fish Audio S2.1 Pro is priced at $15 per 1 million UTF-8 bytes, while ElevenLabs charges $0.04 per 1,000 characters for v4 Turbo and Flash v2.5, with a separate note that v4 is $0.08 per 1,000 characters. Fish supports voice cloning, but the article says ElevenLabs offers Instant Voice Cloning from the Starter plan and Professional Voice Cloning from Creator upward. ElevenLabs’ API billing is distinct from its creative-app pricing, and the article notes that Flash v2.5 covers 32 languages while v4 Turbo covers 90+.
On concurrency, the article says Fish is limited by prepaid tier, while ElevenLabs sets concurrency by subscription plan. For phone audio, the article lists ElevenLabs as supporting ulaw_8000 output. It also says ElevenLabs has a free plan with 10,000 credits but no commercial license until Starter.
The article concludes this section by stating that Fish is lower on list price per million units, but the gap narrows for text with many accented characters because those count as two bytes on Fish. It adds that the alternatives extend beyond ElevenLabs for teams building voice agents.
AssemblyAI-TTS-1 for voice agents
The article singles out AssemblyAI-TTS-1 as a model built for production voice agents. It says the model is trained on millions of hours of audio, including real conversational data, and runs with unlimited concurrency and no prepaid tiers or contracts at $15 per 1 million characters. Against Fish Audio S2.1 Pro, the article cites an independent Cekura benchmark dated Oct. 28, 2026, showing time to first audio of 159 milliseconds for AssemblyAI-TTS-1 versus 321 milliseconds for Fish Audio S2.1 Pro, and 92% versus 86% for correctly reading codes and addresses.
Other features listed for AssemblyAI-TTS-1 include instant voice cloning at the same per-character price, streaming WebSocket and HTTP endpoints, word-level timestamps, a cancel message for barge-in handling, and text-to-speech processing in the US or EU at the same price. The article also says it offers reference integrations for LiveKit and Pipecat, a single API key for Universal-3.6 Pro Realtime speech-to-text, LLM Gateway and AssemblyAI-TTS-1, and compliance coverage including SOC 2 Type 2, ISO 27001, PCI DSS and GDPR, with 99.9% uptime. It says emotion control is coming soon on AssemblyAI-TTS-1.
The article does not present a verified universal ranking of the “best” alternative. It instead frames the decision around deployment requirements: creator workflows, voice-agent latency, concurrency, regional processing, cloning rights and commercial terms.