Speechify vs Cartesia

Speechify

FreemiumAI audiotext to speech

Speechify is the mainstream 'read anything aloud' assistant, claiming 55M+ users and topping the App Store's text-to-speech charts. The same engine is available as a developer TTS API (1,000+ voices, 60+ languages, instant voice cloning, SSML, streaming), so it spans consumers and builders. The free tier is deliberately thin -- 10 robotic voices, TTS-only -- and consumer Premium is $29/mo, while API pricing is signup-gated rather than public. Its edge is distribution and reach, not raw model novelty.

Freemium · TTS-only). Premium $29/mo (cheaper billed annually). Separate developer TTS API (console.speechify.ai) with voice cloning, SSML, and streaming -- per-unit API pricing is signup-gated, not public. As of June 2026.

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EDITORIAL PICK

Cartesia

FreemiumAI audiotext to speech

Cartesia builds real-time-first voice models -- its Sonic TTS and Ink STT rank #1 on Artificial Analysis speech leaderboards for combined quality and speed. Built on state-space (Mamba-style) architectures for ultra-low latency, it's purpose-made for voice agents and powers platforms like Retell. One developer API covers TTS, STT, and voice agents, with a genuinely usable free tier (20K credits/mo) and paid plans from $5/mo, plus cloud, on-prem, and on-device deployment. The main friction is an abstract credit model and promo pricing that muddies the long-term cost.

Freemium · ~27 TTS min, no commercial use). Pro $5/mo (~133 min, commercial + instant voice cloning). Startup $49/mo, Scale $299/mo, Enterprise custom. Voice agents ~$0.06/min + telephony. One API for TTS/STT/agents. As of June 2026.

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● EDITORIAL VERDICT · BIGBANGINDEX

Cartesia edges Speechify on aggregate — 88 vs 79.

The latency king for real-time voice agents -- best-in-class speed and quality with a fair free tier, if you can stomach credit-based math. Speechify still wins for buyers who prioritise 1,000+ voices across 60+ languages. Both tools are independently scored — the right pick depends on which dimensions matter most for your workflow.

● SPEC SHEET

Side-by-side, every cell sourced.

Pricing pulled from each tool's public site. Scores follow the BigBang Score rubric — pricing transparency, free tier, API support, update frequency, unique factor, documentation, and community.

Feature

Speechify

Cartesia

Pricing model

Tier and access type

Freemium

Pricing detail

First-tier sticker

Free tier (10 voices

Free $0/mo (20K credits

Capabilities & access

Pricing transparency

How clear the pricing page is

14/20

Free tier

Free plan generosity

9/15

12/15

API support

Public API + SDK quality

13/15

15/15

Update frequency

Shipping cadence

14/15

15/15

Quality signals

Unique factor

Differentiation from peers

13/15

15/15

Documentation

Docs depth + clarity

8/10

9/10

Community

Active user community

8/10

Verdict

BigBang Score

Composite of all 7 signals

79/100

88/100

● WHICH ONE FOR YOU?

Use-case picks.

Cut through the spec sheet. Here's what we'd recommend depending on what matters most.

Pick Speechify if…

You prioritise 1,000+ voices across 60+ languages and same api powers a 55m+ user product (battle-tested).

SPick: Speechify

Pick Cartesia if…

You prioritise true free tier with a commercial upgrade path and #1-ranked real-time speech quality and speed.

CPick: Cartesia

Editorial pick

Cartesia wins our composite score (88/100). It edges ahead on aggregate — but the right tool depends on which dimensions matter most.

CPick: Cartesia

BigBangIndex Editorial

Independent AI tool reviews · Updated regularly

Each comparison uses the same 7-signal BigBang Score rubric. Pricing pulled from tool sites; capabilities verified against documentation. Affiliate links are disclosed inline and never affect rank.

Methodology All comparisons

● MORE COMPARISONS

Related head-to-heads in AI audio.

Cartesia vs ElevenLabs — AI audio

BigBang Scores 88/100 vs 88/100. Pricing, capabilities, and editorial verdict inside.

Same categoryRead comparison →

Cartesia vs AssemblyAI — AI audio

BigBang Scores 88/100 vs 88/100. Pricing, capabilities, and editorial verdict inside.

Same categoryRead comparison →

Cartesia

Freemium

OpenAI Whisper

Cartesia vs OpenAI Whisper — AI audio

BigBang Scores 88/100 vs 88/100. Pricing, capabilities, and editorial verdict inside.

Same categoryRead comparison →

● FAQ

Speechify vs Cartesia - frequently asked.

Direct answers tuned for AI search engines (ChatGPT, Perplexity, Claude) and Google's People Also Ask.

The short answer.

Cartesia wins on aggregate, but Speechify pulls ahead on specific axes - the spec sheet above shows where each one earns its keep.

Full Cartesia review →Full Speechify review →All AI audio tools →

01Which is better, Speechify or Cartesia?

Cartesia edges Speechify on aggregate, 88/100 vs 79/100 on the BigBang Score. The composite is calculated from seven signals: pricing transparency, free tier, API support, update frequency, unique factor, documentation, and community. The right pick depends on which dimensions matter most for your workflow.

02Is Speechify or Cartesia cheaper?

Speechify: Free tier (10 voices, TTS-only). Premium $29/mo (cheaper billed annually). Separate developer TTS API (console.speechify.ai) with voice cloning, SSML, and streaming -- per-unit API pricing is signup-gated, not public. As of June 2026.. Cartesia: Free $0/mo (20K credits, ~27 TTS min, no commercial use). Pro $5/mo (~133 min, commercial + instant voice cloning). Startup $49/mo, Scale $299/mo, Enterprise custom. Voice agents ~$0.06/min + telephony. One API for TTS/STT/agents. As of June 2026.. The pricing-transparency and free-tier rows in the spec table above show the precise side-by-side breakdown.

03What are the main differences between Speechify and Cartesia?

Both are AI audio tools. Speechify 1,000+ voices across 60+ languages; Cartesia true free tier with a commercial upgrade path. The full spec sheet above renders the per-axis differences with benchmark bars.

04Should I pick Cartesia?

Cartesia wins our composite BigBang Score, but Speechify can still be the right pick if you prioritise 1,000+ voices across 60+ languages or same api powers a 55m+ user product (battle-tested). The use-case picks above pair each tool with the workflow it serves best.