# ChainForge vs Vellum

| Attribute | ChainForge | Vellum |
|---|---|---|
| **vioscaleAI score** | 54.3 (54% (medium)) | 57.3 (35% (low)) |
| activity.commits_last_30d | 49 | - |
| adoption.dependent_repos | 0 | - |
| adoption.github_stars | 3,036 | - |
| content.faq | `[{"answer":"An open-source platform that enables users to experiment with multiple language models, compare outputs across different prompts and settings, and evaluate LLM quality without requiring extensive coding knowledge. It is indexed under Prompt Management.","source":"https://chainforge.ai","question":"What is ChainForge?","confidence":0.6},{"answer":"ChainForge is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.","source":"https://chainforge.ai","question":"Is ChainForge free to use?","confidence":0.6},{"answer":"We have confirmed browser-based access to ChainForge. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://chainforge.ai","question":"What platforms does ChainForge support?","confidence":0.6},{"answer":"Yes. ChainForge can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://chainforge.ai","question":"Can ChainForge be self-hosted?","confidence":0.6},{"answer":"We have confirmed 5 integrations for ChainForge, including OpenAI, Google Gemini, Alpaca, Llama and Dalai. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://chainforge.ai","question":"What does ChainForge integrate with?","confidence":0.6},{"answer":"Yes. ChainForge is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/ianarawjo/ChainForge","question":"Is ChainForge open source?","confidence":0.95}]` | `[{"answer":"A cloud-based AI assistant that maintains continuous context about your preferences and history, accessible via web, desktop, mobile, and messaging platforms, capable of automating tasks like email, calendar management, and web browsing with your explicit approval for each action. It is indexed under Prompt Management.","source":"https://vellum.ai","question":"What is Vellum?","confidence":0.6},{"answer":"Vellum offers a free tier, so you can start without paying. Paid plans start at $30 per month. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.","source":"https://vellum.ai","question":"Is Vellum free?","confidence":0.6},{"answer":"Vellum supports the web, macOS, iOS and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://vellum.ai","question":"What platforms does Vellum support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Vellum, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://vellum.ai","question":"Can Vellum be self-hosted?","confidence":0.6},{"answer":"We have confirmed 11 integrations for Vellum, including Gmail, Google Calendar, Slack, Telegram, Web browsing, Computer control, Phone calls and Image generation, plus 3 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://vellum.ai","question":"What does Vellum integrate with?","confidence":0.6},{"answer":"Vellum is available worldwide. Its primary market is the United States.","source":"https://vellum.ai","question":"Where is Vellum available?","confidence":0.5}]` |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"cloud":true,"hybrid":true,"self_hosted":true}` |
| description.long | A visual environment for systematically comparing and evaluating LLM prompts, models, and their responses through data flow workflows. | A personal AI assistant that runs locally or in the cloud, maintains long-term memory, automates tasks across your tools and files, and is available across all your devices. |
| features.capabilities | `{"ab_testing":true,"pricing_model":"open-source-self-host","self_hostable":true,"deployment_model":"self-hosted","multi_step_flows":true,"non_engineer_editing":true,"multi_model_playground":true,"llm_judge_or_human_eval":true}` | `{"pricing_model":"usage/seat-based-saas","self_hostable":true,"deployment_model":"managed-SaaS","multi_step_flows":true,"approval_workflow":true,"non_engineer_editing":true,"multi_model_playground":true}` |
| integrations.count | 5 | 3 |
| integrations.list | `[{"name":"OpenAI"},{"name":"Google Gemini"},{"name":"Alpaca"},{"name":"Llama"},{"name":"Dalai"},{"name":"Ollama","native":true}]` | `[{"name":"Gmail"},{"name":"Google Calendar"},{"name":"Slack"},{"name":"Telegram"},{"name":"Web browsing"},{"name":"Computer control"},{"name":"Phone calls"},{"name":"Image generation"},{"name":"Coding"},{"name":"App building"},{"name":"Task management"},{"name":"Google Workspace","native":true,"category":"productivity"},{"name":"Notion","native":true,"category":"productivity"}]` |
| language.primary | TypeScript | - |
| license.spdx | MIT | - |
| market.availability | - | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"web":true}` | `{"cli":true,"ios":true,"mac":true,"web":true,"android":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://chainforge.ai","retrievedAt":"2026-10-13T11:17:53.413Z"}` | `{"type":"hybrid","plans":[{"free":true,"name":"Free (Local)","components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"Runs on your machine locally","contactSales":false},{"free":false,"name":"Mighty","components":[{"kind":"fixed","amount":30,"period":"month","currency":"USD"}],"description":"Vellum Cloud with dedicated compute and storage","contactSales":false},{"free":false,"name":"Super","components":[{"kind":"fixed","amount":100,"period":"month","currency":"USD"}],"description":"Vellum Cloud with dedicated compute and storage","contactSales":false},{"free":false,"name":"Ultra","components":[{"kind":"fixed","amount":200,"period":"month","currency":"USD"}],"description":"Vellum Cloud with dedicated compute and storage","contactSales":false}],"summary":"Free to download and run locally, or from $30/month for cloud hosting","currency":"USD","freeTier":true,"sourceUrl":"https://vellum.ai","retrievedAt":"2026-10-02T16:21:04.757Z","startingPrice":{"amount":30,"period":"month","currency":"USD"},"billingPeriods":["month"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | freemium |
| pricing.price_level | free | mid |
| pricing.starting_price | - | `{"amount":30,"currency":"USD"}` |
| pricing.transparent | yes | yes |
| release.cadence_days | 25 | - |
| release.history | `[{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.3.7","date":"2026-09-16T22:14:21Z","type":"stable","version":"v0.3.7"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.3.6","date":"2025-05-11T19:44:26Z","type":"stable","version":"v0.3.6"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.3.5","date":"2025-04-15T03:10:54Z","type":"stable","version":"v0.3.5"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.3.4","date":"2025-02-28T19:59:33Z","type":"stable","version":"v0.3.4"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.3.2.5","date":"2024-12-19T20:51:44Z","type":"stable","version":"v0.3.2.5"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.3.1.5","date":"2024-04-25T18:01:52Z","type":"stable","version":"v0.3.1.5"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.3.1","date":"2024-03-31T02:59:20Z","type":"stable","version":"v0.3.1"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.3","date":"2024-03-06T04:30:09Z","type":"stable","version":"v0.3"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/add-prettier","date":"2024-02-24T16:50:10Z","type":"stable","version":"add-prettier"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.2.9.5","date":"2024-01-20T01:49:21Z","type":"stable","version":"v0.2.9.5"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.2.8.9","date":"2024-01-08T23:53:59Z","type":"stable","version":"v0.2.8.9"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.2.8","date":"2023-12-13T19:03:09Z","type":"stable","version":"v0.2.8"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.2.6.5","date":"2023-10-23T20:55:41Z","type":"stable","version":"v0.2.6.5"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.2.6","date":"2023-08-27T19:43:31Z","type":"stable","version":"v0.2.6"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/docs","date":"2023-08-05T15:45:55Z","type":"stable","version":"docs"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.2.5","date":"2023-07-26T16:21:13Z","type":"stable","version":"v0.2.5"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.2.1.2","date":"2023-07-19T21:35:37Z","type":"stable","version":"v0.2.1.2"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.2.1","date":"2023-07-12T21:33:20Z","type":"stable","version":"v0.2.1"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.2","date":"2023-06-30T19:15:52Z","type":"stable","version":"v0.2"},{"url":"https://github.com/ianarawjo/ChainForge/releases/tag/v0.1.7.2","date":"2023-06-23T13:38:30Z","type":"stable","version":"v0.1.7.2"}]` | - |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=chainforge&per_page=100","last_12m":0,"max_severity":null}` | - |

## Capabilities (Prompt Management)

| Capability | ChainForge | Vellum |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Versioning model | - | - |
| Diff and rollback | - | - |
| Deploy without redeploy | - | - |
| Non engineer editing | ✓ | ✓ |
| Multi model playground | ✓ | ✓ |
| Ab testing | ✓ | - |
| LLM judge or human eval | ✓ | - |
| Multi step flows | ✓ | ✓ |
| Approval workflow | - | ✓ |
| Tracing included | - | - |
| Self hostable | ✓ | ✓ |
| Deployment model | Self hosted | Managed SaaS |
| Pricing model | Open source self host | Usage/seat based saas |

*Source: vioscaleAI. Generated 2026-10-16T20:46:41.099Z. "-" = undocumented, not absent.*