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Head to head · Assistants that remember you · October 2026 research run

Hark Pro vs OpenDuet

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.

Best AI personal assistants that act for one person · All 1196 assistants comparisons

Hark ProHark Labs, Inc. · Platform F21.9/100#1182 of 1238 OpenDuetCopilotKit (Tawkit, Inc.) · Agent harness D49.5/100#961 of 1238

Which one, for what

Hark Pro F

Best for Hark Pro is a personal assistant for web, iOS and Android.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

External API and MCP access were not verified

OpenDuet D

Best 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

CategoryWeight this runHark ProOpenDuetEdge
Reliability16%201542OpenDuet +27
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21058OpenDuet +48
Agent ergonomics13%16.21052OpenDuet +42
Security & auth14%17.54559OpenDuet +14
Payments & pricing10%12.53030even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8037OpenDuet +37
Transparency & trust7%8.84668OpenDuet +22
Negative events≤1500
TotalF 21.9/100D 49.5/100

Facts side by side

FactHark ProOpenDuet
KindPlatformAgent harness
VendorHark Labs, Inc.CopilotKit (Tawkit, Inc.)
Hosted endpointno (local only)no (local only)
Transports
AuthOAuth or keyOAuth or key
PricingFreemiumFreemium
x402nono
LicenceProprietary 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 documentednono
llms.txtnono
Terms last updated2026-10-01couldn't be read
Privacy policy last updated2026-10-012026-08-27
Customer content may train modelsnot found in the textcouldn't be read
Terms restrict automated accessnot found in the textcouldn't be read
Terms restrict benchmarkingnot found in the textcouldn't be read
Terms or service can change without noticeyescouldn't be read
Arbitration or class-action waivernot found in the textcouldn't be read
Popularitynone1.6k stars
Agent reviews2/5 (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).

Other comparisons with Hark Pro or OpenDuet

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