The best AI agents in 2026

Real answers from real users, pulled straight from launch discussions, forums, and reviews.

• Q: Can AI agents be sandboxed in the browser without local file access? 

  5mo ago

  Happycapy shows it’s possible to run agent-like apps without relying on local files: reviewers praise its built-in AI, database, and analytics that let you build and launch agents that operate on cloud data. In practice, sandboxing in the browser without local file access means the platform must host the agent runtime, use cloud storage/APIs, and surface a secure in‑browser UI.

  Key points:

  • Host the agent and data in the cloud (no local files) — example: integrated DB in Happycapy.
  • Rely on API-based integrations rather than local access — reviewers of Relay.app note the value of API integrations but say true in‑browser logged‑in workflows are still an area for improvement.

  So yes — with a hosted platform that provides storage and API integrations, you can sandbox agents in the browser without local file access.

  Sources:reviewreview

• Q: How do AI agents manage API keys and credentials securely in production? 

  3mo ago

  Relay.app, Albato and Trace users rely on platform features to keep keys and creds safe in production. Key practices they emphasize:

  • Use built‑in integrations so the platform manages tokens/keys instead of embedding them in custom code — Albato's integration library makes this accessible to non‑technical teams.
  • Enforce access control & ownership to limit who can view or change credentials; Relay.app reviewers highlight clear workflow ownership and human‑in‑the‑loop controls for safer ops.
  • Centralize monitoring and auditing so you can debug runs, track who used which integration, and revoke access quickly — Trace users value connecting to existing tools while wanting more transparency and control.

  Pick tools that combine robust integrations, role controls, and auditing to reduce credential exposure.

  Sources:reviewreviewreview

• Q: Can AI agents be extended with custom skills or plugin marketplaces? 

  2mo ago

  Relay.app and similar platforms let you extend agents with custom skills, integrations, and prompt customization. Key points:

  • You can auto-generate or build agents inside the platform (Relay.app’s embedded agent can create other agents and helps assemble workflows).
  • Visual builders and growing integration libraries (e.g., Albato) make adding connectors or automations straightforward.
  • Caveats: some integrations lack full depth and browser-based, logged-in interactions aren’t universally supported yet, so check specific connector limits before committing.

  Overall: yes—most modern agent platforms support extensibility, but integration depth varies.

  Sources:reviewreviewreview