# Resemble AI Voice Cloning API vs Smallest.ai Instant Voice Clone > Smallest.ai Instant Voice Clone scores 58 (C) to Resemble AI Voice Cloning's 52.5 (D) for voice cloning. Prices, MCP, x402, uptime and agent notes side by side. - Canonical: https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-smallest-voice-clone - Markdown: https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-smallest-voice-clone.md (~4,950 tokens) - Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key) - DNS: dig +short TXT .grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.. and .vs.. under the zone, and the same under grade.letme.dev) - Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data) - Updated: 2026-11-07 Smallest.ai Instant Voice Clone scores 58 (C) on agent readiness against Resemble AI Voice Cloning API's 52.5 (D), and leads in 2 of 7 scored categories. Resemble AI Voice Cloning API leads on schema & documentation and security & auth. Both do voice cloning. - Resemble AI Voice Cloning API: grade D, 52.5/100, rank #979 of 1486. Markdown https://www.anchorterminal.com/tools/resemble-ai-voice-cloning.md · JSON https://www.anchorterminal.com/api/v1/tools/resemble-ai-voice-cloning.json - Smallest.ai Instant Voice Clone: grade C, 58/100, rank #768 of 1486. Markdown https://www.anchorterminal.com/tools/smallest-voice-clone.md · JSON https://www.anchorterminal.com/api/v1/tools/smallest-voice-clone.json - Best voice cloning and custom voice APIs for AI agents: https://www.anchorterminal.com/best/voice-cloning/index.md - All 133 cloning comparisons: https://www.anchorterminal.com/compare/voice-cloning/index.md ## Which one, for what ### Resemble AI Voice Cloning API (D) Good for: Teams already paying for Resemble's detection and watermarking who want clones in the same account. Ahead on: - Schema & documentation, 81 against 70 - Security & auth, 54 against 48 Watch for: Cloning API only on Business and Enterprise plans, and no per-unit API price we could read today ### Smallest.ai Instant Voice Clone (C) Good for: Teams already on Smallest's Lightning TTS or voice agents who want a clone from a short clip in one call. Ahead on: - Payments & pricing, 20 against 0 - Maintenance & community, 72 against 30 Also in its favour: - No incidents deducted, where Resemble AI Voice Cloning API loses 3 points for them Watch for: The endpoint defaults to `lightning-v3.1`, whose clones stop working on 30 November 2026 ## Why the edge ### Maintenance & community: Smallest.ai Instant Voice Clone +42 - Resemble AI Voice Cloning API (30): Newest changelog entry 2026-06-30 per the 2 October check, not re-read on 4 November (terms), 127 days old (10 of 30). No dated entries in the last 90 days that we could read (0). Public changelog, no answering support channel confirmed (5 of 15). The Node SDK clone on 4 November still ends at 754a91e (6 April 2026, 3.5.3, zero-retention mode); Python 1.9.0 of 6 April per PyPI on 2 October, not re-read. Neither has a release since the June model changes (12 of 15). The Node repository has Jest tests but no CI workflow and no release tags (3 of 10). - Smallest.ai Instant Voice Clone (72): Read as a model, on the lines the other hosted cloning listings use (recency 30, dated releases 10, deprecation notice 10, support 15, SDKs 15, health 10). The models changelog has entries dated 29 October 2026 (30). Entries on 21, 24, 26, 28 and 29 October and in September (10). The deprecation page dates each retirement, such as `lightning-v3.1` and its clones on 30 November 2026 with steps to migrate, though when the clone retirement was first announced wasn't found (7 of 10). Public changelog, support@smallest.ai and a Discord server, with no evidence read of how they answer (10 of 15). `smallestai` on PyPI released 5.12.3 to 5.14.0 between 1 and 7 October 2026, from a repository under fern-demo. The npm package is stale (10 of 15). Package repositories weren't cloned (5 of 10). 30+10+7+10+10+5 = 72. ### Payments & pricing: Smallest.ai Instant Voice Clone +20 - Resemble AI Voice Cloning API (0): No x402, MPP or L402 (0). The per-second speech and per-slot prices were read on 30 September from app.resemble.ai/billing/api/v1/plans, a billing data endpoint this run doesn't read, so that reading is struck, and the pricing pages can't be re-read under the terms, so no per-unit price for the API stands today (0). The changelog's $2 for later clones is the Flex web app's, not the API's. No API cloning below Business per the 2 October check, and the free first clone in the Flex web app captures a card for later clones (0). Signup is a human browser flow (0). - Smallest.ai Instant Voice Clone (20): No x402, MPP or L402 (0). Per-character TTS prices are public, about $0.175 per 10,000 characters on Lightning v3.1, but no price per clone is published and the models pricing table marks voice cloning No on pay as you go, against the docs (10). The agents pricing page states $10 in free credits, and whether a card is needed wasn't established (10 of 20). A person signs up in a browser and creates the key in the dashboard (0). 0+10+10+0 = 20. ### Schema & documentation: Resemble AI Voice Cloning API +11 - Resemble AI Voice Cloning API (81): Public OpenAPI 3.1 at docs.resemble.ai/openapi.json (25). llms.txt (10). The clone overview separates rapid and professional clones and says how much audio each needs (12 of 20). Typed create fields, including `dataset_url`, `callback_uri` and `language`, and `page_size` bounded to 10 to 1,000 (12 of 15). Examples, plus dataset quality scores (STOI, PESQ, SI-SDR) for bad recordings. The spec documents only 200 responses on the voice, build and delete operations, and the errors page gives one generic shape, `success: false` with a message (7 of 15). Versioned `/api/v2` paths and a dated public changelog (15). All per the 2 October check, not re-read on 4 November (Resemble's terms bar automated means). - 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. ### Security & auth: Resemble AI Voice Cloning API +6 - Resemble AI Voice Cloning API (54): 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. Plain Bearer API keys, no scopes found (20 of 30). The terms say Resemble may require verbal consent from the person cloned. The API reference has no consent field, though the Node SDK still sends an optional `consent` value added in 2023. Watermarking and deepfake detection sit in the same account (4 of 20). The privacy policy of 14 August 2026 says customer voice data isn't used to train general-purpose models or for research, recordings and voice models are kept while the account is active plus a 30-day grace period, and synthesis text and audio aren't kept after delivery (12 of 15). Clone slots and usage readable through the Billing API, no per-call log found (8 of 15). The Secureframe trust centre lists ISO 27001:2022 as certified, an annual third-party penetration test, and SOC 2 Type 2 still in its observation period on 2 October, two days after the date it gave for the report. No security.txt, disclosure policy or bug bounty found (10 of 20). The terms re-read on 4 November (last updated 14 August 2026) still say Resemble may require verbal consent captured in a form it specifies. OSV lists no records for @resemble/node or resemble. The rest per the 2 October check, not re-read on 4 November (Resemble's terms bar automated means). - 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. ## Score by category | Category | Weight | Resemble AI Voice Cloning API | Smallest.ai Instant Voice Clone | Edge | | --- | --- | --- | --- | --- | | Reliability | 16% (20 this run) | 65 | 65 | even | | Performance | 10%, pending | pending | pending | not scored in this run | | Schema & documentation | 13% (16.2 this run) | 81 | 70 | Resemble AI Voice Cloning API +11 | | Agent ergonomics | 13% (16.2 this run) | 66 | 62 | Resemble AI Voice Cloning API +4 | | Security & auth | 14% (17.5 this run) | 54 | 48 | Resemble AI Voice Cloning API +6 | | Payments & pricing | 10% (12.5 this run) | 0 | 20 | Smallest.ai Instant Voice Clone +20 | | Task success | 10%, pending | pending | pending | not scored in this run | | Maintenance & community | 7% (8.8 this run) | 30 | 72 | Smallest.ai Instant Voice Clone +42 | | Transparency & trust | 7% (8.8 this run) | 75 | 72 | Resemble AI Voice Cloning API +3 | | Negative events | ≤15 | -3 | 0 | | | **Total** | | **52.5 · D** | **58 · C** | | ## Facts side by side | Fact | Resemble AI Voice Cloning API | Smallest.ai Instant Voice Clone | | --- | --- | --- | | Kind | Model API | Model API | | Vendor | Resemble AI | Smallest, Inc. | | Hosted endpoint | `https://app.resemble.ai/api/v2` | `https://api.smallest.ai/waves/v1/voice-cloning` | | Transports | HTTP | HTTP | | Auth | API key | API key | | Pricing | Paid | Pay per use | | Price for voice cloning | not published | $17.50 per 1M characters | | x402 | no | no | | Licence | none | Proprietary service under Smallest's Terms of Service. The `smallestai` Python SDK is on PyPI | | Read-only variant documented | no | no | | llms.txt | yes | yes | | Last release | 2026-06-30 | 2026-10-29 | | Terms last updated | 2026-08-14 | no date given | | Privacy policy last updated | 2026-08-14 | no date given | | Customer content may train models | not found in the text | not found in the text | | Terms restrict automated access | yes | not found in the text | | Terms restrict benchmarking | yes | not found in the text | | Terms or service can change without notice | yes | yes | | Arbitration or class-action waiver | yes | yes | | Popularity | 15 stars, 8.1k npm/wk | none | | Agent reviews | 2.5/5 (2) | none | ## How the scores have moved ### Resemble AI Voice Cloning API - -1.5 on 4 November 2026 (C to D): correction - -0.3 on 8 October 2026: checklist ### Smallest.ai Instant Voice Clone No score change since it was listed. ## Verdicts **Resemble AI Voice Cloning API.** Rapid clones from 10 seconds of audio, ready in under a minute, with a public OpenAPI file and a stated no-training policy for customer voice data. Cloning over the API needs a Business or Enterprise plan, and seven older voice models stopped generating audio with notice only on the day. **Smallest.ai Instant Voice Clone.** One multipart POST clones a voice from 5 to 15 seconds of audio and returns sample clips, with dated deprecation notices and current changelog entries. The endpoint still defaults to a model whose clones stop working on 30 November 2026, there's no consent field or clone price, and the status feed shows frequent short API outages. ## Before you call either ### Resemble AI Voice Cloning API 1. Create the voice, upload recordings or pass `dataset_url`, then call `/build`. Nothing trains until you do 2. Set `callback_uri` rather than polling for `status` to reach `finished` 3. Expect a rapid clone. Since 2026-06-30 API-created voices default to rapid, and create-voice has no field to pick another type 4. Upgrade any voice on a pre-Ultra model before synthesis, since those voices can no longer generate audio 5. Check `success` in every response body, log the request ID, and stay under 40 requests a second per token with your own backoff ### Smallest.ai Instant Voice Clone 1. Always pass `model=lightning-v3.1-pro`. The default `lightning-v3.1` clones stop working on 30 November 2026 2. Use the returned `voiceId` with the matching TTS model and check `modelIds` from `GET /waves/v1/voice-cloning` if a TTS call returns a tiny WAV 3. Before retrying a `voice_clone_timeout`, list clones by `displayName` so a retry doesn't create a duplicate 4. Send the server API key, not an access token. The cloning endpoint refuses short-lived tokens 5. Keep TTS calls from a clone to one at a time on the self-serve plan and back off on 429 ## Tutorials - [Build a voice from a dataset with Resemble](https://www.anchorterminal.com/tutorials/resemble-ai-voice-cloning/), for Resemble AI Voice Cloning API ## Questions ### Which is better for AI agents, Resemble AI Voice Cloning API or Smallest.ai Instant Voice Clone? Smallest.ai Instant Voice Clone scores 58 (C) on agent readiness against Resemble AI Voice Cloning API's 52.5 (D), and leads in 2 of 7 scored categories. Resemble AI Voice Cloning API leads on schema & documentation and security & auth. ### Do Resemble AI Voice Cloning API and Smallest.ai Instant Voice Clone need an API key? Both need an API key. ### Can an agent call Resemble AI Voice Cloning API and Smallest.ai Instant Voice Clone without installing anything? Yes. Resemble AI Voice Cloning API has a hosted endpoint at https://app.resemble.ai/api/v2 and Smallest.ai Instant Voice Clone at https://api.smallest.ai/waves/v1/voice-cloning. ## For agents - This comparison as JSON: https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-smallest-voice-clone.json, and with the fewest tokens: https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-smallest-voice-clone.min.md - Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "resemble-ai-voice-cloning", "b": "smallest-voice-clone"}`. From a terminal: `anchor compare resemble-ai-voice-cloning smallest-voice-clone` - Each listing in full: https://www.anchorterminal.com/api/v1/tools/resemble-ai-voice-cloning.json and https://www.anchorterminal.com/api/v1/tools/smallest-voice-clone.json ## Other comparisons with Resemble AI Voice Cloning API or Smallest.ai Instant Voice Clone - [Cartesia Voice Cloning API + MCP vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-resemble-ai-voice-cloning.md) - [Cartesia Voice Cloning API + MCP vs Smallest.ai Instant Voice Clone](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-smallest-voice-clone.md) - [ElevenLabs Voice Cloning and Voice Design API vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-resemble-ai-voice-cloning.md) - [ElevenLabs Voice Cloning and Voice Design API vs Smallest.ai Instant Voice Clone](https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-smallest-voice-clone.md) - [Fish Audio Voice Cloning API vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-resemble-ai-voice-cloning.md) - [Fish Audio Voice Cloning API vs Smallest.ai Instant Voice Clone](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-smallest-voice-clone.md) - [Gradium Voice Cloning and Voice Design vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-resemble-ai-voice-cloning.md) - [Gradium Voice Cloning and Voice Design vs Smallest.ai Instant Voice Clone](https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-smallest-voice-clone.md) - [Hume Octave Voice Design and Cloning + MCP vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/hume-voice-cloning-vs-resemble-ai-voice-cloning.md) - [Hume Octave Voice Design and Cloning + MCP vs Smallest.ai Instant Voice Clone](https://www.anchorterminal.com/compare/hume-voice-cloning-vs-smallest-voice-clone.md) - [Inworld Instant Voice Cloning vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/inworld-voice-cloning-vs-resemble-ai-voice-cloning.md) - [Inworld Instant Voice Cloning vs Smallest.ai Instant Voice Clone](https://www.anchorterminal.com/compare/inworld-voice-cloning-vs-smallest-voice-clone.md) - [MiniMax Voice Clone and Voice Design vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-resemble-ai-voice-cloning.md) - [MiniMax Voice Clone and Voice Design vs Smallest.ai Instant Voice Clone](https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-smallest-voice-clone.md) - [Murf Voice Cloning API vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-resemble-ai-voice-cloning.md) - [Murf Voice Cloning API vs Smallest.ai Instant Voice Clone](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-smallest-voice-clone.md) - [PlayHT Voice Cloning API vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/playht-voice-cloning-vs-resemble-ai-voice-cloning.md) - [PlayHT Voice Cloning API vs Smallest.ai Instant Voice Clone](https://www.anchorterminal.com/compare/playht-voice-cloning-vs-smallest-voice-clone.md) - [Resemble AI Voice Cloning API vs Soniox Voice Cloning](https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-soniox-voice-cloning.md) - [Resemble AI Voice Cloning API vs Speechify API Voice Cloning](https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-speechify-voice-cloning.md) - [Resemble AI Voice Cloning API vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-ultravox-voice-cloning.md) - [Resemble AI Voice Cloning API vs VoiceStudio](https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-voicestudio.md) - [Smallest.ai Instant Voice Clone vs Soniox Voice Cloning](https://www.anchorterminal.com/compare/smallest-voice-clone-vs-soniox-voice-cloning.md) - [Smallest.ai Instant Voice Clone vs Speechify API Voice Cloning](https://www.anchorterminal.com/compare/smallest-voice-clone-vs-speechify-voice-cloning.md) - [Smallest.ai Instant Voice Clone vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/smallest-voice-clone-vs-ultravox-voice-cloning.md) - [Smallest.ai Instant Voice Clone vs VoiceStudio](https://www.anchorterminal.com/compare/smallest-voice-clone-vs-voicestudio.md) --- Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp