A local mechanics check, not a cloud drafting assistant.
Spellbook is a cloud legal AI for drafting and reviewing contracts. OhmsCounsel does something narrower on your Mac: fixed rules proofread an agreement's defined terms, definition pointers, section numbering, cross-references, exhibits and schedules, party names, number words, and renewal notice periods, with no model and no account. Earlier versions, including 1.8.1, could also send contract text to a provider you configured with your own key; Silo Systems never receives it.
OhmsCounsel vs Spellbook.
on-device · vs cloud| Dimension | OhmsCounsel | Cloud legal AI (Spellbook) |
|---|---|---|
| Where it runs | On your Mac by default | Their cloud LLM |
| Your contracts | Local by default; never sent to Silo | Sent to servers for analysis |
| Account | None required | Per-seat license |
| Pricing | One-time $19.99 | Per-seat subscription |
| What it does | Proofreads mechanics: terms, pointers, numbering, references, attachments, parties, numbers, notice periods | Cloud drafting & review |
| How findings are made | Fixed rules; each finding opens its exact source passage | AI-assisted cloud review |
| Clause review and redlines | Not included; see Silo Vault | Cloud drafting & review |
| Confidentiality | Contract text stays local by default | Uploaded to a third party |
| Minimum commitment | None | Seat minimums / annual terms |
| Works without internet | Yes, with nothing to download | No |
Cloud column reflects the typical architecture of Spellbook and similar hosted tools. Names are trademarks of their owners; not affiliated.
Spellbook alternative, answered.
OhmsCounsel · on-deviceFor one part of the job. OhmsCounsel does not draft, summarize, or judge clauses. It proofreads an agreement's mechanics on your Mac with fixed rules: undefined, duplicate, or unused defined terms, pointers to the wrong section, numbering slips, references to missing sections or attachments, party names that drift, words and digits that disagree, and renewal notice periods longer than the term. For clause review, playbook comparison, and redlines, see Silo Vault.
Not to Silo Systems, which runs no server. OhmsCounsel makes no internet requests: import, the checks, your decisions and notes, and report export all stay on your Mac, with no account and no model download. Earlier versions, including 1.8.1, also offered an optional Bring Your Own Key mode that sent document text, file names, questions and playbook positions directly from your Mac to the provider you configured, plus a model download and model-catalog check that never included your documents.
OhmsCounsel is a one-time $19.99 purchase with no seat licensing. Spellbook is sold as a per-seat subscription, typically with annual terms and seat minimums for teams.
No. OhmsCounsel checks document mechanics. It is not legal advice, does not create an attorney-client relationship, and does not tell you whether a contract is fair or complete.
Keep your work on your Mac.
OhmsCounsel: $19.99 one-time · no subscription. No subscription, no account, and nothing uploaded unless you add your own key: an on-device-first alternative to Spellbook.