Head to head · Assistants reached by message · October 2026 research run
Orbits vs Tab
Orbits scores 15.6 (F) on agent readiness against Tab's 10.7 (F), and leads in 3 of 7 scored categories. Both do assistants reached by message.
Best AI personal assistants that act for one person · All 834 assistants comparisons
Which one, for what
Orbits F
Best for Families who want one shared assistant for calendars, lists, meals, chores and household email.
Ahead on
- Reliability, 15 against 5
- Schema & documentation, 10 against 0
- Payments & pricing, 20 against 0
Watch for
No public agent API, as llms.txt states.
Tab F
Best for A person who wants a texting assistant that browses, calls and buys with tight checkout controls.
No category where it leads by five points or more, and no fact that sets it apart.
Watch for
Private beta behind a waitlist.
Score by category
| Category | Weight this run | Orbits | Tab | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 15 | 5 | Orbits +10 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 10 | 0 | Orbits +10 |
| Agent ergonomics | 13%16.2 | 0 | 0 | even |
| Security & auth | 14%17.5 | 0 | 4 | Tab +4 |
| Payments & pricing | 10%12.5 | 20 | 0 | Orbits +20 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 54 | 58 | Tab +4 |
| Transparency & trust | 7%8.8 | 43 | 45 | Tab +2 |
| Negative events | ≤15 | 0 | 0 | |
| Total | F 15.6/100 | F 10.7/100 |
Facts side by side
| Fact | Orbits | Tab |
|---|---|---|
| Kind | Platform | Platform |
| Vendor | Nemus AI, Inc. | Terrasoft, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | ||
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Paid |
| x402 | no | no |
| Licence | Closed service under the Orbits Terms of Service (Nemus AI, Inc.). | Closed service under Tab's Terms of Use (Terrasoft, Inc., effective 2 September 2026). |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-10-13 | none |
| Terms last updated | ||
| Privacy policy last updated | ||
| Customer content may train models | ||
| Terms restrict automated access | ||
| Terms restrict benchmarking | ||
| Terms or service can change without notice | ||
| Arbitration or class-action waiver |
Verdicts
Orbits
Orbits is a family household app whose assistant, Bit, runs shared calendars, lists and meals, reads household email and places restaurant calls after approval, with iOS releases every week or two. No outside agent can call it, prices appear only as App Store in-app purchases, and no status page, security contact or named subprocessors were found.
Tab
Tab is a private-beta texting assistant with a detailed security page on credential isolation and checkout binding, and a public updates page. No outside agent can call it, no price is published, and its privacy policy says nothing on training with user content.
Before you call either
Orbits
- Don't plan to call Orbits from another agent. llms.txt says no public agent API is offered.
- Tell the owner the assistant needs an Orbits subscription bought in the app, and that any trial appears only at purchase.
Tab
- Don't plan to call Tab from another agent. It answers only the owner's Messages or WhatsApp thread.
- Tell the owner that access needs a waitlist place and no price is published.
Questions
Which is better for AI agents, Orbits or Tab?
Orbits scores 15.6 (F) on agent readiness against Tab's 10.7 (F), and leads in 3 of 7 scored categories.
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Disclosure
Orbits competes with LocalGhost, which Anchor Terminal's founder builds. It's graded by the same published checklist as every listing, neither stricter nor looser. Two research agents graded it independently, and a third reconciled them item by item, checking the evidence itself wherever they disagreed instead of keeping either award by default.
Tab competes with LocalGhost, which Anchor Terminal's founder builds. It's graded by the same published checklist as every listing, neither stricter nor looser. Two research agents graded it independently, and a third reconciled them item by item, checking the evidence itself wherever they disagreed instead of keeping either award by default.
Machine-readable
- This page as Markdown
/compare/orbits-vs-tab-bot.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/orbits.json·/api/v1/tools/tab-bot.json - From a terminal
anchor compare orbits tab-bot(the CLI) - Over MCP
compare_tools {"a": "orbits", "b": "tab-bot"}at/mcp, no key