Charlotte vs Fiddler Everywhere
Both tools do the same core job: they sit as a proxy on your machine, decrypt HTTPS, and let you read the traffic your applications send. They are shaped differently in three ways that usually decide it — how you pay, whether you need an account, and whether your AI agent can query the capture.
The short version
Fiddler Everywhere is a mature, team-oriented product with collaboration features, cross-platform builds and enterprise support, sold as a per-seat subscription that requires an account.
Charlotte.Pro is a single-developer tool: one payment, no account, nothing leaves your machine, and a built-in MCP server so a coding agent can read the traffic directly. It is Windows and macOS only, and it is much newer.
Side by side
| Charlotte.Pro | Fiddler Everywhere | |
|---|---|---|
| Price | $29.99 once | Lite $7 · Pro $13 · Enterprise $37 per user / month, billed annually |
| Licence model | One-time, never expires | Subscription — access ends when it lapses |
| Account required | No | Yes — sign-in is required to use the app |
| Free trial | 14 days, every feature unlocked, no card | Trial available after creating an account |
| MCP server for AI agents | Built in — 9 tools, read and write | Not offered |
| Telemetry | None — there is no backend | Cloud-backed product with account services |
| Platforms | Windows, macOS | Windows, macOS, Linux |
| Team sharing / collaboration | No | Yes — a core part of the product |
| Breakpoints, map & rewrite rules | Yes | Yes |
| Throttling / fault injection | Yes | Yes |
| Mobile device capture | Yes — QR-code setup for iOS and Android | Yes |
| HAR import / export | Yes | Yes |
| Native ARM64 on Windows | Yes | Check current vendor docs |
Fiddler Everywhere pricing from telerik.com/purchase/fiddler, read 4 August 2026. Monthly billing is higher ($10 / $19). Verify before you buy — vendor pricing changes.
What the money looks like over time
Charlotte is a one-time $29.99 purchase. Fiddler Everywhere Pro at $13 per user per month billed annually is $156 per user per year.
| Per developer | Charlotte.Pro | Fiddler Everywhere Pro |
|---|---|---|
| Year 1 | $29.99 | $156 |
| Year 3 cumulative | $29.99 | $468 |
| Team of 5, year 3 | $149.95 | $2,340 |
That gap is the honest headline. It is also why the comparison is not automatic: what you give up is the collaboration layer those seats pay for.
When Fiddler Everywhere is the better choice
- You work on Linux. Charlotte has no Linux build. This one is decisive.
- Your team shares captures. Sending a session to a colleague with a known identity is what Fiddler's account model buys, and Charlotte has no equivalent.
- You need enterprise procurement. Volume licensing, invoicing, SSO and a support contract are things Progress provides and a one-person shop does not.
- You need a long track record. Fiddler has been around for years. Charlotte's Windows app shipped in 2026.
When Charlotte is the better choice
- You are one developer who wants to own a tool. One payment, no renewal, no seat to keep justifying.
- You use a coding agent. Charlotte's MCP server lets Claude Code, Claude Desktop, Cursor or Copilot search a capture, open any request and even replay or rewrite it. This is the feature with no equivalent on the other side.
- You cannot sign in to a vendor cloud. Some environments make account-gated tooling a non-starter. Charlotte has no account and no backend to talk to.
- You care where the traffic goes. Charlotte captures in memory, has no telemetry, and keeps the CA private key encrypted with Windows DPAPI on your machine.
Things Charlotte does not do
Worth knowing before you install rather than after:
- HTTP/3 (QUIC) is not decrypted. It runs over UDP and cannot be intercepted by a TCP proxy. Charlotte can strip
Alt-Svcto force an HTTP/2 fallback so those hosts stay inspectable. - No Linux build.
- No team or cloud features. By design, but it is a real gap if you need them.
- Certificate-pinned apps will still reject the intercepted certificate unless you exclude them — true of every proxy of this kind, Fiddler included.
Fiddler and Fiddler Everywhere are trademarks of Progress Software Corporation. Charlotte is not affiliated with or endorsed by Progress. This page is a good-faith comparison written by Charlotte's developer; every claim about Fiddler comes from Progress's own published documentation and pricing pages on the date shown above.