# Smallest.ai Instant Voice Clone vs Speechify API Voice Cloning (slim)

> Speechify API Voice Cloning scores 76.9 (BB) to Smallest.ai Instant Voice Clone's 58 (C) for voice cloning. Speechify API Voice Cloning is cheaper for voice cloning, $6 against $17.50 per 1M characters. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/smallest-voice-clone-vs-speechify-voice-cloning.md (~5,250 tokens) · this version ~2,780 tokens · JSON https://www.anchorterminal.com/compare/smallest-voice-clone-vs-speechify-voice-cloning.json · canonical https://www.anchorterminal.com/compare/smallest-voice-clone-vs-speechify-voice-cloning
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-07
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Speechify API Voice Cloning scores 76.9 (BB) on agent readiness against Smallest.ai Instant Voice Clone's 58 (C), and leads in 6 of 7 scored categories. Both do voice cloning. Speechify API Voice Cloning is cheaper for voice cloning, $6 against $17.50 per 1M characters.

- Smallest.ai Instant Voice Clone: C 58, rank #772 of 1510 · https://www.anchorterminal.com/tools/smallest-voice-clone.min.md
- Speechify API Voice Cloning: BB 76.9, rank #37 of 1510 · https://www.anchorterminal.com/tools/speechify-voice-cloning.min.md
- Smallest.ai Instant Voice Clone, good for Teams already on Smallest's Lightning TTS or voice agents who want a clone from a short clip in one call. Also No incidents deducted, where Speechify API Voice Cloning loses 3 points for them.
- Speechify API Voice Cloning, good for Best where a consent record and a published destruction schedule for voice data matter, such as cloning staff or talent voices for a product. Ahead on Reliability, 90 against 65; Schema & documentation, 94 against 70; Agent ergonomics, 97 against 62; Security & auth, 87 against 48. Also Cheaper for voice cloning, $6 against $17.50 per 1M characters; Agent-ready, a grade of BB or better.

| Category | Smallest.ai Instant Voice Clone | Speechify API Voice Cloning |
| --- | --- | --- |
| Reliability (16%) | 65 | 90 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 70 | 94 |
| Agent ergonomics (13%) | 62 | 97 |
| Security & auth (14%) | 48 | 87 |
| Payments & pricing (10%) | 20 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 72 | 75 |
| Transparency & trust (7%) | 72 | 75 |

| Fact (where they differ) | Smallest.ai Instant Voice Clone | Speechify API Voice Cloning |
| --- | --- | --- |
| Vendor | Smallest, Inc. | Speechify |
| Hosted endpoint | `https://api.smallest.ai/waves/v1/voice-cloning` | `https://api.speechify.ai/v1` |
| Pricing | Pay per use | Paid |
| Price for voice cloning | $17.50 per 1M characters | $6 per 1M characters |
| Licence | Proprietary service under Smallest's Terms of Service. The `smallestai` Python SDK is on PyPI | MIT (SDKs) |
| Terms last updated | no date given | 2024-06-10 |
| Privacy policy last updated | no date given | 2026-07-22 |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | none | 3 stars, 1.9k npm/wk, 6.5k PyPI/wk |
| Agent reviews | none | 3.6/5 (8) |

Why the edge:
- Security & auth, Speechify API Voice Cloning +39: Smallest.ai Instant Voice Clone 48 (Graded for voice cloning as the other listings in this category, with consent and misuse controls in place of the read-only line and training and retention of voice data in place of the prompt-injection line. Plain bearer keys, shown once, revocable, with rotation guidance and no scopes. Short-lived access tokens are refused on the cloning endpoint (20 of 30). No consent or verification field. The Terms let Smallest demand proof that the speaker authorised a clone and remove voices without it, and the prohibited use policy bars unauthorised impersonation. No watermark found (6 of 20). The Terms say Smallest won't use User Content or Input to train its services. Zero retention and retention windows are Enterprise options, and no retention period for samples is published (9 of 15). A usage dashboard, with no audit log found (5 of 15). A valid security.txt naming security@smallest.ai and a HIPAA business associate agreement page. The trust centre didn't answer through our proxy, so no certification was confirmed first-hand, and no bug bounty was found (8 of 20). 20+6+9+5+8 = 48.); Speechify API Voice Cloning 87 (Graded for voice cloning, with consent and misuse controls in place of the read-only line and training and retention of voice data in place of the prompt-injection line, since the API returns audio and IDs rather than third-party text. Service-account keys with scopes (`voices:read`, `voices:write`, `audio:all`), rotation with a grace window, and minted child keys capped at 24 hours (30). Every clone needs a single-use consent challenge, the speaker reads the phrase, and the create call is refused unless the words and speaker match, plus output watermarking with a detection endpoint (20). The trust page says Speechify never trains on customer data. The Biometric Data Retention and Destruction Policy, effective 6 October 2026, destroys voice samples, voice models and verification data within 30 days of the voice's deletion, consent withdrawal or account closure, and at most 24 months after the last interaction, with backups gone within 90 days. Consent records without biometric data are kept 5 years, and no period is stated for TTS text and audio (14 of 15). Usage and spend roll up per service account, and `GET /v1/projects/{project_id}/audit` gives a 90-day trail of who changed a project's access and when, with no per-call log found (11 of 15). security.txt valid (its Expires date sat a year ahead on 6 October, 17 October and 1 November) pointing to a trust page that claims SOC 2 Type II, with the report on Enterprise per the pricing page; no bug bounty or public advisories found (12 of 20). 30 + 20 + 14 + 11 + 12 = 87.)
- Agent ergonomics, Speechify API Voice Cloning +35: Smallest.ai Instant Voice Clone 62 (The clone response is a compact object with the voice ID, status and signed URLs to sample clips rather than inline audio (20 of 25). The list call returns every clone on the organisation with no pagination or filter found (10 of 20). Errors carry a message and, on 500, an `error_code` enum with a stated fix, such as retrying `voice_clone_timeout` (16 of 20). No idempotency key, and retrying a timeout can leave a duplicate clone, with deletion through an oddly named route (4 of 20). Two required fields. The Python SDK `smallestai` 5.14.0 is current, while the npm package `smallestai` was last published on 16 April 2025 (12 of 15). 20+10+16+4+12 = 62.); Speechify API Voice Cloning 97 (Creating a voice returns a compact voice object, and `GET /v1/voices` takes `type=personal` to list only the workspace's clones (25). Voice lists page by `cursor` with `limit` up to 200 and the `type` filter (20). Machine-readable error codes with a `fields` map for validation failures, and the consent guide names three separate 422 codes and a 409 for an expired challenge (20). `Idempotency-Key` on voice creation, with `idempotency_conflict` on reuse (20). Cloning needs two calls and five fields because of the consent step, with official Python and TypeScript SDKs, both at 5.0.0 since 29 October (12 of 15).)
- Reliability, Speechify API Voice Cloning +25: Smallest.ai Instant Voice Clone 65 (Graded on the hosted cloning API with the hosted lines. status.smallest.ai is the vendor's own status page with components per region and a dated incident feed (20). The feed, read on 6 November, has dozens of automated outage alerts on the API components in the 90 days from 8 August, most a few minutes long, and a cluster across every API region from 13 to 17 September. The 60-day uptime bars read 99.790 per cent for API USA and 99.849 per cent for API Global. No single outage of an hour was found, but repeated wide outages read as one major episode (10). Rate limits are published for TTS (one concurrent request, 100 a minute on pay as you go), while the per-organisation clone limit has no number (10 of 15). The limits page says to handle 429 gracefully and the clone errors say to retry a timeout, with no Retry-After, backoff figures or idempotency key (5 of 15). The pricing table lists an Enterprise SLA of 99.99 per cent (10). Instant cloning carries no beta label (10). 20+10+10+5+10+10 = 65.); Speechify API Voice Cloning 90 (Status page at status.speechify.ai (Better Stack) with an API component (20). The API shows 100 per cent uptime over the 90 days from 4 August to 1 November 2026 and the incident feed lists none. The Documentation component shows 35 minutes of downtime on 12 October and the Console component downtime on 23 days, every day from 4 to 22 August among them and under 25 minutes on each of 15 and 19 September and 16 and 19 October, neither of them the API (30). Rate and concurrency limits published per plan, 1 to 150 sustained requests a second and 3 to 100 concurrent, re-read on 1 November (15). 429 comes with `Retry-After`, `rate_limited` and `concurrency_limit_reached` codes, RateLimit headers and exponential backoff guidance, and `POST /v1/voices` takes an `Idempotency-Key` with a 24 hour replay window (15). No SLA found (0). Cloning is generally available (10). 20 + 30 + 15 + 15 + 0 + 10 = 90.)
- Schema & documentation, Speechify API Voice Cloning +24: Smallest.ai Instant Voice Clone 70 (The API reference pages are generated with typed fields, enums and error schemas, but no OpenAPI file was found linked from the docs or llms.txt (5 of 25). llms.txt and a Markdown copy of every page (10). The guide says when to use the Pro pool, how to check `modelIds` before synthesis and why a mismatched clone returns empty audio, while the reference still names the retiring default (14 of 20). `model` and `language` are enums validated by the server, with required `displayName` and `file`, a 5 MB limit and MIME types listed, and `tags` as a comma-separated string (12 of 15). Examples in curl, Python and Node.js and a table of seven error cases with causes (14 of 15). Paths under `/v1`, a deprecation page with dated statuses and a models changelog with entries on 21, 24, 26, 28 and 29 October 2026 (15). 5+10+14+12+14+15 = 70.); Speechify API Voice Cloning 94 (OpenAPI 3.1 at docs.speechify.ai/openapi.json with 23 paths, including consent challenges, projects, webhooks and entitlements, re-read on 1 November. The WebSocket input stream added on 8 October isn't among the 23 paths (25). llms.txt per section, Markdown pages and a docs-search MCP server (10). The consent guide, re-read on 1 November, and the cloning overview explain the flow, when a request will be refused and how to branch on each refusal code (16 of 20). Inputs typed, with a `gender` enum, sample and consent recording length limits, though `locale` is a free string (13 of 15). Each endpoint lists its error codes and statuses, with examples (15). Dated `Speechify-Version` header and a changelog with entries several times a month (15). 25 + 10 + 16 + 13 + 15 + 15 = 94.)

| Task | Smallest.ai Instant Voice Clone | Speechify API Voice Cloning |
| --- | --- | --- |
| Narrate a 9,000-character script | $0.16 to $0.18 | $0.05 |