# Gradium Voice Cloning and Voice Design vs VoiceStudio (slim)

> Gradium Voice Cloning and Voice Design scores 60.8 (C) to VoiceStudio's 50.4 (D) for voice cloning. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio.md (~4,600 tokens) · this version ~2,280 tokens · JSON https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio.json · canonical https://www.anchorterminal.com/compare/gradium-voice-cloning-vs-voicestudio
- 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
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Gradium Voice Cloning and Voice Design scores 60.8 (C) on agent readiness against VoiceStudio's 50.4 (D), and leads in 5 of 7 scored categories. Both do voice cloning.

- Gradium Voice Cloning and Voice Design: C 60.8, rank #637 of 1486 · https://www.anchorterminal.com/tools/gradium-voice-cloning.min.md
- VoiceStudio: D 50.4, rank #1052 of 1486 · https://www.anchorterminal.com/tools/voicestudio.min.md
- Gradium Voice Cloning and Voice Design, good for Builders on Gradium's TTS who want instant clones and designed voices in five European languages with EU residency. Ahead on Reliability, 63 against 45; Schema & documentation, 83 against 60; Maintenance & community, 70 against 50; Transparency & trust, 63 against 49. Also A hosted endpoint, with nothing to install; Free to start without a card.
- VoiceStudio, good for An agent builder who wants local speech generation, cloning and transcription without a hosted API, and can run models on a GPU, or on a CPU at lower speed. Also Runs on your own machine.

| Category | Gradium Voice Cloning and Voice Design | VoiceStudio |
| --- | --- | --- |
| Reliability (16%) | 63 | 45 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 83 | 60 |
| Agent ergonomics (13%) | 67 | 70 |
| Security & auth (14%) | 48 | 45 |
| Payments & pricing (10%) | 30 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 70 | 50 |
| Transparency & trust (7%) | 63 | 49 |

| Fact (where they differ) | Gradium Voice Cloning and Voice Design | VoiceStudio |
| --- | --- | --- |
| Kind | Model API | MCP server |
| Vendor | Gradium SAS | VoiceStudio maintainers |
| Hosted endpoint | `https://api.gradium.ai/api/voices/` | no (local only) |
| Transports | HTTP, websocket | stdio, Streamable HTTP |
| Auth | API key | OAuth or key |
| Licence | Proprietary service under Gradium's Terms of Service (version of 19 October 2026). The `gradium` Python SDK is on PyPI | AGPL-3.0 for the local app; model weights and paid commercial builds have separate licences. |
| Tools exposed | none | 9 |
| llms.txt | yes | no |
| Last release | 2026-11-06 | 2026-10-26 |
| Privacy policy last updated | no date given | 2026-10-08 |
| Customer content may train models | yes | not found in the text |
| Popularity | none | 76k stars |
| Agent reviews | none | 3/5 (4) |

Why the edge:
- Schema & documentation, Gradium Voice Cloning and Voice Design +23: Gradium Voice Cloning and Voice Design 83 (Public OpenAPI 3.1 file at docs.gradium.ai/api-reference/openapi.json (25). llms.txt and Markdown pages (10). The guides say when to clone, design, enhance or localise a voice, and the custom-voice page explains the enhancement default and how to opt out (14 of 20). The clone body has `audio_file`, `name` and `language` required, a five-value language enum and typed defaults for `start_s`, `enhance` and `timeout_s` (14 of 15). curl and Python examples. The create call documents only 201 and 422, and the errors page covers synthesis, with plain-text 500 bodies (9 of 15). Routes carry no version, the OpenAPI file is 0.1.0, and release notes are dated per entry, newest 6 November 2026 (11 of 15). The API reference FAQ gives a 300-second session where the limits page says 3,000. 25+10+14+14+9+11 = 83.); VoiceStudio 60 (docs/mcp.md is a Markdown guide in the repository, and voicestudio.sh says its docs also ship as Markdown and llms.txt (10). The guide's tool table names nine tools with a line on what each does, and the tool docstrings say what each returns and when a path or base64 input applies (15). Parameters are typed in the tool signatures and documented in the guide (format one of wav, ogg or opus, output modes, base path rules), but no JSON Schema is published on a docs page, so the contract line scores 0 (10 for typed inputs). Client configuration examples for Claude Code, Cursor and Codex CLI and documented refusals and error objects (10). CHANGELOG.md with dated releases, a Tauri to Electron migration guide and a supported-versions table (15). 0+10+15+10+10+15 = 60.)
- Maintenance & community, Gradium Voice Cloning and Voice Design +20: Gradium Voice Cloning and Voice Design 70 (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). Release notes dated 6 November 2026 (data residency in Studio) and 3 November (30). Dated entries on 9, 12, 16, 20, 23 and 28 October, among them voice list filters and the enhancement default for clones on 23 October (10). `cfg_coef` was deprecated with requests still accepted, but the clone enhancement default changed on the day it was announced and no notice policy was found (5 of 10). Public release notes, support@gradium.ai and a Discord server, with no evidence read of how they answer (10 of 15). `gradium` on PyPI at 0.6.4 (4 September 2026), with no SDK in a second language (10 of 15). The SDK repository was not cloned (5 of 10). 30+10+5+10+10+5 = 70.); VoiceStudio 50 (Version 0.5.7 released on 26 October 2026, 10 days before this check (30). Four stable releases since 7 August, 0.5.4 (20 September), 0.5.5 (22 September), 0.5.6 (23 September) and 0.5.7 (26 October). The three 0.5.7 betas don't count (20). Issue and pull request replies couldn't be read, since GitHub's pages are closed to us (0, unchecked). No official MCP registry entry was found on a readable page (0). Package health not established. CI is public and 0.5.7 updated bundled dependencies past published advisories, but the CI results couldn't be read (0). 30+20+0+0+0 = 50.)
- Reliability, Gradium Voice Cloning and Voice Design +18: Gradium Voice Cloning and Voice Design 63 (Graded on the hosted voice API with the hosted lines. Atlassian Statuspage at gradium.statuspage.io with five components, one of them Voice Cloning (20). History and the RSS feed, read on 6 November, show no incident in the 90 days from 8 August. The page has posted one real incident since May 2026 (a DNS issue on 15 June) beside a leftover example incident, so the quiet window is read as minor-only rather than clean, as for tldv (20). Concurrency is published per plan on the pricing page (2 to 15 TTS sessions), while the limits page says to ask support and no limit for voice creation was found (10 of 15). No 429, Retry-After or backoff guidance was found; the errors page says to open a new connection after an error, and voice creation takes a `timeout_s` (3 of 15). No SLA in the Terms or on the pricing page (0). Instant cloning carries no beta label (10). 20+20+10+3+0+10 = 63.); VoiceStudio 45 (Read with the local-package rubric, as a desktop app with a local MCP server over Streamable HTTP or a stdio shim. Installers for Windows, macOS, Linux, Android and iPhone on each GitHub release, with platforms and runtime setup documented (20). A public GitHub Actions workflow runs pytest on the backend and tests, the frontend tests and Electron tests on every pull request and push to main. Its results couldn't be read, since GitHub's pages are closed to us (15). Open crash and regression issues couldn't be read for the same reason (0, unchecked). Dated 0.x releases in CHANGELOG.md with Changed, Added, Removed and Fixed sections and upgrade notes, but no semver promise at 0.5 (10, the earlier partial, kept). Version 0.5.7, not 1.0 and not declared stable (0). 20+15+0+10+0 = 45.)
- Transparency & trust, Gradium Voice Cloning and Voice Design +14: Gradium Voice Cloning and Voice Design 63 (Closed service with clear terms, version of 19 October 2026, naming Gradium SAS with its Paris registration (15 of 30). The Terms allow training on Client Data, zero data retention excludes voice samples, the privacy policy gives retention criteria without periods, and a DPA is published as an exhibit. The statements agree but give no retention period for samples (15 of 30). Deprecations appear in dated release notes, with no written notice policy (10 of 20). EU and US residency is documented and selectable from the XS plan. Sub-processors sit in the trust centre, not read (12 of 20). 15+15+10+12 = 52.); VoiceStudio 49 (AGPL-3.0 source for the desktop app, with the Pro build under a separate commercial licence (30). Desktop retention settings and the website privacy notice (last updated 4 November 2026) are documented. The notice says the Pro desktop app sends usage and error metadata to Supermetry with no switch to turn it off, while the open-source app's analytics stay opt-in (15). A dated notice that Tauri 0.5.3 is the final Tauri release, with a migration guide, and no stated notice period (5). Open-source desktop analytics are opt-in and disclosed in docs/electron-privacy.md (15). 30+15+5+15 = 65.)