# Fiddler vs Scalar

**Leader by vioscaleAI score:** Scalar

| Attribute | Fiddler | Scalar |
|---|---|---|
| **vioscaleAI score** | 56.9 (72% (medium)) | 63.2 (70% (medium)) |
| activity.commits_last_30d | - | 100 |
| adoption.dependent_repos | - | 1 |
| adoption.github_stars | - | 16,253 |
| adoption.package_downloads_weekly | - | 1,422,867 |
| content.faq | `[{"answer":"Fiddler is a debugging proxy that intercepts HTTP and HTTPS traffic between applications and servers, enabling developers to inspect, modify, and analyze network communication for troubleshooting purposes. Available as a modern cross-platform subscription service or legacy free Windows tool. It is indexed under API Development Tools.","source":"https://www.telerik.com/fiddler","question":"What is Fiddler?","confidence":0.6},{"answer":"Fiddler offers a free tier, so you can start without paying. Paid plans start at $7 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://www.telerik.com/fiddler","question":"Is Fiddler free?","confidence":0.6},{"answer":"Fiddler supports Windows, macOS and Linux. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.telerik.com/fiddler","question":"What platforms does Fiddler support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Fiddler, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://www.telerik.com/fiddler","question":"Can Fiddler be self-hosted?","confidence":0.6},{"answer":"We have independently confirmed SOC 2 for Fiddler. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Fiddler not holding them. Always confirm compliance directly before you rely on it.","source":"https://www.telerik.com/fiddler","question":"What security certifications does Fiddler have?","confidence":0.6},{"answer":"Fiddler is available worldwide. Its primary market is the United States.","source":"https://www.telerik.com/fiddler","question":"Where is Fiddler available?","confidence":0.5}]` | `[{"answer":"An open-source platform for building API documentation sites that includes automatically generated SDKs, a browser-based API client, and API registry capabilities. Supports OpenAPI and AsyncAPI specifications. It is indexed under API Development Tools.","source":"https://scalar.com/products/agent/pricing","question":"What is Scalar?","confidence":0.6},{"answer":"Scalar is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. A commercial or hosted edition starts at $72 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://scalar.com","question":"Is Scalar free to use?","confidence":0.6},{"answer":"We have confirmed browser-based access to Scalar. 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://scalar.com/products/agent/pricing","question":"What platforms does Scalar support?","confidence":0.6},{"answer":"Yes. Scalar can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://scalar.com/products/agent/pricing","question":"Can Scalar be self-hosted?","confidence":0.6},{"answer":"We have independently confirmed SOC 2 and GDPR for Scalar. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Scalar not holding them. Always confirm compliance directly before you rely on it.","source":"https://scalar.com/security","question":"What security certifications does Scalar have?","confidence":0.7},{"answer":"Yes. Scalar 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/scalar/scalar","question":"Is Scalar open source?","confidence":0.99},{"answer":"Scalar is available worldwide. Its primary market is the United States.","source":"https://scalar.com","question":"Where is Scalar available?","confidence":0.5}]` |
| deployment.options | `{"cloud":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | A web debugging tool that captures, logs, and enables inspection and modification of HTTP(S) requests and responses flowing between your device and the internet. | A platform that creates API documentation, type-safe client libraries, and AI-ready tools from OpenAPI documents, ensuring all developer interfaces stay synchronized as APIs evolve. |
| features.capabilities | `{"mock_server":true,"rest_client":true,"ci_integration":true}` | `{"api_docs":true,"mock_server":true,"rest_client":true,"grpc_support":true,"collaboration":true,"ci_integration":true,"openapi_import":true,"graphql_support":true,"automated_testing":true}` |
| integrations.count | 1 | 4 |
| integrations.list | `[{"name":"MCP","native":true}]` | `[{"name":"Agent"},{"name":"FastAPI","native":true,"category":"api_framework"},{"name":"ASP.NET Core","native":true,"category":"api_framework"},{"name":"Hono","native":true,"category":"api_framework"},{"name":"Elysia","native":true,"category":"api_framework"},{"name":"Hapi","native":true,"category":"api_framework"},{"name":"Docker","native":true,"category":"deployment"},{"name":"Docusaurus","native":true,"category":"documentation"},{"name":"GitHub","native":true,"category":"version_control","direction":"bidirectional"},{"name":"Vercel AI SDK","native":true,"category":"ai","direction":"inbound"},{"name":"OpenAI Agents SDK","native":true,"category":"ai","direction":"inbound"},{"name":"Anthropic Claude Agent SDK","native":true,"category":"ai","direction":"inbound"}]` |
| language.primary | - | TypeScript |
| license.spdx | - | MIT |
| market.availability | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"mac":true,"linux":true,"windows":true}` | `{"cli":true,"mac":true,"web":true,"linux":true,"windows":true}` |
| pricing | `{"type":"subscription","plans":[{"free":false,"name":"Fiddler Everywhere","summary":"$7/month","features":["Capture and modify HTTP/S traffic","API composer for request editing"],"commitment":"monthly","components":[{"kind":"fixed","amount":7,"period":"month","currency":"USD"}],"contactSales":false},{"free":true,"name":"Fiddler Classic","summary":"Free (non-commercial use only)","features":["Manually inspect and debug Windows HTTP/S traffic","Basic Composer support"],"contactSales":false}],"summary":"From $7/month for Fiddler Everywhere. Free tier available. 10-day trial.","currency":"USD","freeTier":true,"sourceUrl":"https://www.telerik.com/fiddler","retrievedAt":"2026-09-03T23:02:38.844Z","freeTrialDays":10,"startingPrice":{"amount":7,"period":"month","currency":"USD"},"billingPeriods":["month"]}` | `{"type":"subscription","plans":[{"free":true,"name":"Free","summary":"Free forever","features":["Hosted OpenAPI docs","Built-in API client","Landing pages","1 editor seat"],"minSeats":1,"components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"contactSales":false,"includedLimits":{"apis":"3","sdks":"1","sdk_endpoints":"25","agent_scalar_credits":"50"}},{"free":false,"name":"Pro","summary":"$150/month or $125/month billed yearly ($1,500/year)","features":["Hosted MCP servers","5 editor seats","Access groups included","Volume discounts available"],"minSeats":5,"commitment":"monthly","components":[{"kind":"fixed","amount":150,"period":"month","currency":"USD"},{"kind":"fixed","amount":1500,"period":"year","currency":"USD"}],"contactSales":false,"includedLimits":{"apis":"15","sdks":"1","sdk_endpoints":"100","agent_scalar_credits":"500"}},{"free":false,"name":"Business","summary":"$600/month or $500/month billed yearly ($6,000/year)","features":["SSO and subpath hosting","10 editor seats","Volume discounts available"],"minSeats":10,"commitment":"monthly","components":[{"kind":"fixed","amount":600,"period":"month","currency":"USD"},{"kind":"fixed","amount":6000,"period":"year","currency":"USD"}],"contactSales":false,"includedLimits":{"apis":"25","sdks":"1","sdk_endpoints":"250","agent_scalar_credits":"2000"}},{"free":false,"name":"Enterprise","summary":"Custom pricing with SLAs and dedicated support","features":["Unlimited APIs and custom SDK sizes","Priority support and SLAs","SDK and MCP migration services","Dedicated Slack/Teams channel"],"contactSales":true,"includedLimits":{"apis":"unlimited","sdk_endpoints":"custom"}}],"addOns":[{"name":"Additional SDK (Pro)","components":[{"kind":"fixed","amount":150,"period":"month","currency":"USD"}]},{"name":"Additional SDK (Business)","components":[{"kind":"fixed","amount":600,"period":"month","currency":"USD"}]}],"summary":"Free tier available. From $150/month for Pro or $600/month for Business, with yearly billing discounts (2 months free).","currency":"USD","freeTier":true,"sourceUrl":"https://scalar.com/pricing","retrievedAt":"2026-09-10T21:08:43.585Z","startingPrice":{"amount":150,"period":"month","currency":"USD"},"billingPeriods":["month","year"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | freemium |
| pricing.price_level | low | high |
| pricing.starting_price | `{"amount":7,"currency":"USD"}` | `{"amount":150,"currency":"USD"}` |
| pricing.transparent | yes | yes |
| release.cadence_days | - | 3 |
| release.history | - | `[{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-10-12-2c929a3","date":"2026-10-12T16:58:28Z","type":"stable","version":"release-2026-10-12-2c929a3"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-10-05-df37703","date":"2026-10-05T13:48:20Z","type":"stable","version":"release-2026-10-05-df37703"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-10-02-0962afc","date":"2026-10-02T04:46:10Z","type":"stable","version":"release-2026-10-02-0962afc"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-09-30-5d95c40","date":"2026-09-30T13:14:50Z","type":"stable","version":"release-2026-09-30-5d95c40"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-09-29-0e5c088","date":"2026-09-29T09:38:06Z","type":"stable","version":"release-2026-09-29-0e5c088"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-09-25-85e8e22","date":"2026-09-25T10:38:11Z","type":"stable","version":"release-2026-09-25-85e8e22"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-09-24-fcadd46","date":"2026-09-24T11:38:27Z","type":"stable","version":"release-2026-09-24-fcadd46"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-09-22-cba1845","date":"2026-09-22T11:44:13Z","type":"stable","version":"release-2026-09-22-cba1845"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-09-21-e2f3b5c","date":"2026-09-21T18:20:46Z","type":"stable","version":"release-2026-09-21-e2f3b5c"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-09-19-641d279","date":"2026-09-19T03:21:51Z","type":"stable","version":"release-2026-09-19-641d279"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-09-18-85612c4","date":"2026-09-18T20:31:18Z","type":"stable","version":"release-2026-09-18-85612c4"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-09-16-32f4c66","date":"2026-09-16T10:09:00Z","type":"stable","version":"release-2026-09-16-32f4c66"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-09-07-42fc8b1","date":"2026-09-07T10:43:04Z","type":"stable","version":"release-2026-09-07-42fc8b1"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-08-28-df40ed7","date":"2026-08-28T11:32:14Z","type":"stable","version":"release-2026-08-28-df40ed7"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-08-20-1e5ab85","date":"2026-08-20T21:15:27Z","type":"stable","version":"release-2026-08-20-1e5ab85"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-08-13-f20d08b","date":"2026-08-13T07:30:43Z","type":"stable","version":"release-2026-08-13-f20d08b"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-08-13-ef440b4","date":"2026-08-13T23:22:26Z","type":"stable","version":"release-2026-08-13-ef440b4"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-08-07-74f1a3a","date":"2026-08-07T13:56:29Z","type":"stable","version":"release-2026-08-07-74f1a3a"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-07-31-dc1e98f","date":"2026-07-31T00:59:30Z","type":"stable","version":"release-2026-07-31-dc1e98f"},{"url":"https://github.com/scalar/scalar/releases/tag/release-2026-07-20-be8106c","date":"2026-07-20T21:23:53Z","type":"stable","version":"release-2026-07-20-be8106c"}]` |
| reliability.status_page | yes | yes |
| security.certifications | - | `[{"name":"SOC 2 Type 1","level":"Type 1","status":"active"}]` |
| security.disclosure_policy | yes | yes |
| security.gdpr | - | yes |
| security.soc2 | yes | yes |
| security.trust_center | - | https://scalar.com/security |
| security.vulnerabilities | - | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40scalar%2Fuse-modal&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (API Development Tools)

| Capability | Fiddler | Scalar |
|---|:--:|:--:|
| **Core** |  |  |
| REST client | ✓ | ✓ |
| GraphQL support | - | ✓ |
| gRPC support | - | ✓ |
| **Design** |  |  |
| Mock servers | ✓ | ✓ |
| **Testing** |  |  |
| Automated / contract testing | - | ✓ |
| **Collaboration** |  |  |
| Team collaboration & sharing | - | ✓ |
| **Docs** |  |  |
| Doc generation | - | ✓ |
| **Standards** |  |  |
| OpenAPI / spec import | - | ✓ |
| **Ops** |  |  |
| CI integration / CLI | ✓ | ✓ |

*Source: vioscaleAI. Generated 2026-10-16T20:38:18.313Z. "-" = undocumented, not absent.*