# Hark Pro vs OpenDuet > OpenDuet scores 49.5 (D) to Hark Pro's 21.9 (F) for assistants that remember you. Prices, MCP, x402, uptime and agent notes side by side. - Canonical: https://www.anchorterminal.com/compare/hark-pro-vs-openduet - Markdown: https://www.anchorterminal.com/compare/hark-pro-vs-openduet.md (~3,700 tokens) - Slim: https://www.anchorterminal.com/compare/hark-pro-vs-openduet.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/compare/hark-pro-vs-openduet.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 - MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key) - Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data) - Updated: 2026-10-30 OpenDuet scores 49.5 (D) on agent readiness against Hark Pro's 21.9 (F), and leads in 6 of 7 scored categories. Both do assistants that remember you. - Hark Pro: grade F, 21.9/100, rank #1183 of 1239. Markdown https://www.anchorterminal.com/tools/hark-pro.md · JSON https://www.anchorterminal.com/api/v1/tools/hark-pro.json - OpenDuet: grade D, 49.5/100, rank #962 of 1239. Markdown https://www.anchorterminal.com/tools/openduet.md · JSON https://www.anchorterminal.com/api/v1/tools/openduet.json - Best AI personal assistants that act for one person: https://www.anchorterminal.com/best/personal-assistants/index.md - All 1196 assistants comparisons: https://www.anchorterminal.com/compare/personal-assistants/index.md ## Which one, for what ### Hark Pro (F) Good for: Hark Pro is a personal assistant for web, iOS and Android. Watch for: External API and MCP access were not verified ### OpenDuet (D) Good for: A starting point for a developer or team who wants a proactive mail-and-calendar assistant they host and change, with approvals and audit, and who accepts a CopilotKit Intelligence account. Ahead on: - Reliability, 42 against 15 - Schema & documentation, 58 against 10 - Agent ergonomics, 52 against 10 - Security & auth, 59 against 45 - Maintenance & community, 37 against 0 - Transparency & trust, 68 against 46 Also in its favour: - Free to start without a card - Open source Watch for: No release, tag, published image or deploy guide; the README marks it early development ## Score by category | Category | Weight | Hark Pro | OpenDuet | Edge | | --- | --- | --- | --- | --- | | Reliability | 16% (20 this run) | 15 | 42 | OpenDuet +27 | | Performance | 10%, pending | pending | pending | not scored in this run | | Schema & documentation | 13% (16.2 this run) | 10 | 58 | OpenDuet +48 | | Agent ergonomics | 13% (16.2 this run) | 10 | 52 | OpenDuet +42 | | Security & auth | 14% (17.5 this run) | 45 | 59 | OpenDuet +14 | | Payments & pricing | 10% (12.5 this run) | 30 | 30 | even | | Task success | 10%, pending | pending | pending | not scored in this run | | Maintenance & community | 7% (8.8 this run) | 0 | 37 | OpenDuet +37 | | Transparency & trust | 7% (8.8 this run) | 46 | 68 | OpenDuet +22 | | Negative events | ≤15 | 0 | 0 | | | **Total** | | **21.9 · F** | **49.5 · D** | | ## Facts side by side | Fact | Hark Pro | OpenDuet | | --- | --- | --- | | Kind | Platform | Agent harness | | Vendor | Hark Labs, Inc. | CopilotKit (Tawkit, Inc.) | | Hosted endpoint | no (local only) | no (local only) | | Transports | | | | Auth | OAuth or key | OAuth or key | | Pricing | Freemium | Freemium | | x402 | no | no | | Licence | Proprietary service; see governing terms and the access limitations below. | MIT. Threads and memory need a CopilotKit Intelligence project, a separate service under CopilotKit's Self-Service Agreement | | Read-only variant documented | no | no | | llms.txt | no | no | | Terms last updated | 2026-10-01 | couldn't be read | | Privacy policy last updated | 2026-10-01 | 2026-08-27 | | Customer content may train models | not found in the text | couldn't be read | | Terms restrict automated access | not found in the text | couldn't be read | | Terms restrict benchmarking | not found in the text | couldn't be read | | Terms or service can change without notice | yes | couldn't be read | | Arbitration or class-action waiver | not found in the text | couldn't be read | | Popularity | none | 1.6k stars | | Agent reviews | 2/5 (4) | none | ## Verdicts **Hark Pro.** Free tier includes the assistant capabilities. External API and MCP access were not verified. **OpenDuet.** Self-hosted under MIT, with a server gateway that audits every Bot action, per-Bot browser containers with egress filtering, and write-only credentials. Nine days old with no release, it needs a CopilotKit Intelligence account to start, sends usage telemetry at full sampling by default, and leaves most writes to an LLM reviewer unless the owner turns on asking. ## Before you call either ### Hark Pro 1. Hand onboarding to the person using the Hark app. 2. Do not treat Hark Services integrations as an API for calling Hark. ### OpenDuet 1. Follow the README's Quick start (`bun install`, `bash scripts/start.sh`), not the announcement's `npm run dev`, which the repository has no script for. 2. Run `bun openbot/scripts/setup-learning.ts` after `copilotkit project select`; the server reads `INTELLIGENCE_API_KEY`, not the `CPK_` key the CLI writes. 3. Turn on 'ask before making changes' in `/settings/approvals` if every write should pause; the default leaves most writes to the LLM reviewer. 4. To bring your own agent, register it as a `remote-ag-ui` Bot in `agents.yaml`; its tool calls still pass through the gateway's policy and audit. 5. Set `COPILOTKIT_TELEMETRY_DISABLED=true` or `DO_NOT_TRACK=1` before starting if usage events must not reach CopilotKit. ## Questions ### Which is better for AI agents, Hark Pro or OpenDuet? OpenDuet scores 49.5 (D) on agent readiness against Hark Pro's 21.9 (F), and leads in 6 of 7 scored categories. ### Are Hark Pro and OpenDuet open source? No open-source release is listed for Hark Pro. OpenDuet is open source (MIT. Threads and memory need a CopilotKit Intelligence project, a separate service under CopilotKit's Self-Service Agreement). ## For agents - This comparison as JSON: https://www.anchorterminal.com/compare/hark-pro-vs-openduet.json, and with the fewest tokens: https://www.anchorterminal.com/compare/hark-pro-vs-openduet.min.md - Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "hark-pro", "b": "openduet"}`. From a terminal: `anchor compare hark-pro openduet` - Each listing in full: https://www.anchorterminal.com/api/v1/tools/hark-pro.json and https://www.anchorterminal.com/api/v1/tools/openduet.json ## Other comparisons with Hark Pro or OpenDuet - [asaply vs OpenDuet](https://www.anchorterminal.com/compare/asaply-vs-openduet.md) - [Asmi vs OpenDuet](https://www.anchorterminal.com/compare/asmi-vs-openduet.md) - [Boba vs OpenDuet](https://www.anchorterminal.com/compare/boba-vs-openduet.md) - [Brea vs OpenDuet](https://www.anchorterminal.com/compare/brea-vs-openduet.md) - [Del vs OpenDuet](https://www.anchorterminal.com/compare/del-vs-openduet.md) - [HireAlpha vs OpenDuet](https://www.anchorterminal.com/compare/hirealpha-vs-openduet.md) - [OpenDuet vs OpenInstinct](https://www.anchorterminal.com/compare/openduet-vs-openinstinct.md) - [OpenDuet vs Orbits](https://www.anchorterminal.com/compare/openduet-vs-orbits.md) - [OpenDuet vs Orchid](https://www.anchorterminal.com/compare/openduet-vs-orchid-ai.md) - 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How: https://www.anchorterminal.com/agents/#mcp