# Countly vs LaunchDarkly

> LaunchDarkly scores 69.2 (B) on agent readiness against Countly's 54.8 (C), and leads in every scored category. Both do analytics flags. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/countly-vs-launchdarkly
- Markdown: https://www.anchorterminal.com/compare/countly-vs-launchdarkly.md (~2,350 tokens)
- Slim: https://www.anchorterminal.com/compare/countly-vs-launchdarkly.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/countly-vs-launchdarkly.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

LaunchDarkly scores 69.2 (B) on agent readiness against Countly's 54.8 (C), and leads in every scored category. Both do analytics flags.

- Countly: grade C, 54.8/100, rank #607 of 842. Markdown https://www.anchorterminal.com/tools/countly.md · JSON https://www.anchorterminal.com/api/v1/tools/countly.json
- LaunchDarkly: grade B, 69.2/100, rank #185 of 842. Markdown https://www.anchorterminal.com/tools/launchdarkly.md · JSON https://www.anchorterminal.com/api/v1/tools/launchdarkly.json

## Which one, for what

### Countly (C)

Good for: An agent whose owner runs Countly on its own infrastructure or a dedicated Flex server and wants analytics, crash and remote-config data through MCP with per-category permissions.

Also in its favour:
- Open source

Watch for: No public status page or incident history was found for Flex servers or for mcp.count.ly

### LaunchDarkly (B)

Good for: An agent that creates and targets feature flags, runs rollouts and experiments, reads experiment results and cleans up stale flags.

Ahead on:
- Reliability, 64 against 28
- Schema & documentation, 89 against 75
- Payments & pricing, 40 against 17
- Transparency & trust, 80 against 70

Also in its favour:
- Free to start without a card

Watch for: The hosted MCP server lists 141 tools, and no tool filter for it was found in the reviewed documentation


## Score by category

| Category | Weight | Countly | LaunchDarkly | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 28 | 64 | LaunchDarkly +36 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 75 | 89 | LaunchDarkly +14 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 69 | LaunchDarkly +3 |
| Security & auth | 14% (17.5 this run) | 63 | 66 | LaunchDarkly +3 |
| Payments & pricing | 10% (12.5 this run) | 17 | 40 | LaunchDarkly +23 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 80 | 82 | LaunchDarkly +2 |
| Transparency & trust | 7% (8.8 this run) | 70 | 80 | LaunchDarkly +10 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **54.8 · C** | **69.2 · B** | |

## Facts side by side

| Fact | Countly | LaunchDarkly |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Countly Ltd | Catamorphic, Co. (dba LaunchDarkly) |
| Hosted endpoint | `https://mcp.count.ly/mcp` | `https://mcp.launchdarkly.com/mcp/launchdarkly` |
| Transports | HTTP, stdio, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Auth | API key | OAuth or key |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | Countly Lite is AGPL-3.0 with added branding terms under Section 7. Enterprise plugins are proprietary. Flex is a hosted service under Countly's terms. The MCP server is MIT | Proprietary service under LaunchDarkly's terms. The local MCP server is MIT and the ldcli CLI is Apache-2.0 |
| Tools exposed | 209 | 141 |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | 2026-10-07 | 2026-10-06 |
| Terms last updated | 2026-09-25 | 2025-09-08 |
| Privacy policy last updated | 2026-09-25 | 2025-04-08 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 28k npm/wk | 3.3M npm/wk, 2.2M PyPI/wk |

## Verdicts

**Countly.** Countly suits an agent working against a server its owner already runs. The official MCP server filters its 209 tools by edition, plugin and permission and has per-category read-only settings. No status page, OpenAPI document or published API rate limit was found, and the Flex trial needs a credit card.

**LaunchDarkly.** LaunchDarkly suits agents that manage feature flags, rollouts and experiments. The hosted MCP server uses OAuth with dynamic client registration and marks its tools read-only or destructive, and the Developer plan is free without a card. The server lists 141 tools, numeric rate limits are unpublished, and the web application was unavailable for over an hour on 10 July 2026.

## Before you call either

### Countly

1. Create a dedicated token in the Token Manager, limited to the apps and endpoints the task needs, and send it in the `countly-token` header, not the URL
2. Set `COUNTLY_TOOLS_ALL=R` unless the task needs writes. The token's own permissions still apply and the stricter of the two wins
3. Call `apps_list` first. Most tools need `app_id` or an exact `app_name`
4. Check `get_version` for the detected edition before planning funnel, retention or cohort queries, which need Enterprise plugins
5. Set `ENABLE_ANALYTICS=false` to stop usage reports to stats.count.ly, and prefer the stdio server to mcp.count.ly so the server URL and token stay local

### LaunchDarkly

1. Connect to https://mcp.launchdarkly.com/mcp/launchdarkly over streamable HTTP with OAuth. On the EU or federal instance run the local `@launchdarkly/mcp-server` with `--server-url`
2. Authorise with a Reader role or the `reader` scope unless the task writes. A 403 after consent means the member's role lacks access
3. Send `LD-API-Version: 20240415` on every REST call, and `LD-API-Version: beta` for beta resources, which answer 403 without it
4. Read `X-Ratelimit-Global-Remaining`, `X-Ratelimit-Route-Remaining` and `X-Ratelimit-Reset` on each response, and wait `Retry-After` seconds on an IP limit
5. Send `Content-Type: application/json; domain-model=launchdarkly.semanticpatch` for semantic patches, or the body is read as JSON patch and answers 400

## Questions

### Which is better for AI agents, Countly or LaunchDarkly?

LaunchDarkly scores 69.2 (B) on agent readiness against Countly's 54.8 (C), and leads in every scored category.

### Do Countly and LaunchDarkly need an API key?

Countly needs an API key. LaunchDarkly takes an API key or an OAuth sign-in.

### Can an agent call Countly and LaunchDarkly without installing anything?

Yes. Countly has a hosted endpoint at https://mcp.count.ly/mcp and LaunchDarkly at https://mcp.launchdarkly.com/mcp/launchdarkly.

### Are Countly and LaunchDarkly open source?

Countly is open source (Countly Lite is AGPL-3.0 with added branding terms under Section 7. Enterprise plugins are proprietary. Flex is a hosted service under Countly's terms. The MCP server is MIT). No open-source release is listed for LaunchDarkly.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/countly-vs-launchdarkly.json, and with the fewest tokens: https://www.anchorterminal.com/compare/countly-vs-launchdarkly.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "countly", "b": "launchdarkly"}`. From a terminal: `anchor compare countly launchdarkly`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/countly.json and https://www.anchorterminal.com/api/v1/tools/launchdarkly.json

## Other comparisons with Countly or LaunchDarkly

- [Amplitude vs Countly](https://www.anchorterminal.com/compare/amplitude-vs-countly.md)
- [Countly vs Fullstory](https://www.anchorterminal.com/compare/countly-vs-fullstory.md)
- [Countly vs GrowthBook](https://www.anchorterminal.com/compare/countly-vs-growthbook.md)
- [Countly vs Mixpanel](https://www.anchorterminal.com/compare/countly-vs-mixpanel.md)
- [Countly vs Optimizely Experimentation](https://www.anchorterminal.com/compare/countly-vs-optimizely.md)
- [Countly vs Pendo](https://www.anchorterminal.com/compare/countly-vs-pendo.md)
- [Countly vs PostHog](https://www.anchorterminal.com/compare/countly-vs-posthog.md)
- [Countly vs Statsig](https://www.anchorterminal.com/compare/countly-vs-statsig.md)
- [Countly vs Woopra](https://www.anchorterminal.com/compare/countly-vs-woopra.md)
- [Countly vs Heap](https://www.anchorterminal.com/compare/countly-vs-heap.md)
- [GrowthBook vs LaunchDarkly](https://www.anchorterminal.com/compare/growthbook-vs-launchdarkly.md)
- [Amplitude vs LaunchDarkly](https://www.anchorterminal.com/compare/amplitude-vs-launchdarkly.md)
- [LaunchDarkly vs Mixpanel](https://www.anchorterminal.com/compare/launchdarkly-vs-mixpanel.md)
- [LaunchDarkly vs Optimizely Experimentation](https://www.anchorterminal.com/compare/launchdarkly-vs-optimizely.md)
- [LaunchDarkly vs PostHog](https://www.anchorterminal.com/compare/launchdarkly-vs-posthog.md)
- [LaunchDarkly vs Statsig](https://www.anchorterminal.com/compare/launchdarkly-vs-statsig.md)