Spellbook vs Casetext (CoCounsel)

Neither half of this pairing is what it was. Thomson Reuters shut Casetext down on April 1, 2025, so one side cannot be bought at any price. Spellbook is still for sale and still growing, but it withdrew its published pricing, moved from spellbook.legal to spellbook.com, and now sells an agent rather than a sidebar. The trade that brought most people here — a $99 Word add-in against a $200 research subscription — describes two products that no longer exist in that form.

The question underneath survives, and it is the one worth answering: drafting or research, and what does either cost now that both self-serve price points are gone.

What each side did

Casetext’s shutdown is documented on the Casetext entry and does not need re-litigating here. Thomson Reuters bought it in 2023 for $650M, began redirecting casetext.com on February 1, 2025, and retired the standalone platform two months later. The CoCounsel skills ship today inside Thomson Reuters CoCounsel, sold per attorney against the Westlaw corpus.

Spellbook changed shape without changing owners. It raised a $50M Series B led by Khosla Ventures in October 2025 at a $350M post-money valuation, taking total funding past $80M, then added a $40M debt facility from RBCx in March 2026 earmarked for acquisitions. The product surface grew with the balance sheet. Where this catalog’s tool entry describes a Word sidebar that suggests redlines, Spellbook now sells six named pieces — Review, Draft, Compare, Ask, Playbooks, and Associate — with Associate positioned as an agent for multi-document drafting and review rather than a suggestion engine. It reaches past Word into email, Slack, and Salesforce, and reports 4,500+ legal teams across 80+ countries.

Neither one is the cheap self-serve option now

This is the part that inverts the old verdict. Spellbook’s whole argument in the previous draft of this page was per-seat economics: predictable monthly cost for a ten-lawyer transactional team, no procurement cycle. Spellbook no longer publishes a number. Its pricing page states that pricing is determined by the number of team members on a license, calls the result custom pricing, and routes every visitor to a demo — a 7-day trial for qualified legal professionals is the only self-serve door left.

Third-party trackers have filled the vacuum, and they do not agree with each other. Published estimates put the entry seat anywhere from roughly $20 to $99 per user per month, team tiers from roughly $40 to $149, and enterprise from roughly $199 to $350 per user per month with a 10-seat minimum and a reported six-month minimum term. A 5x spread on the entry tier is not a price band. It is evidence that nobody outside Spellbook’s sales team knows, and the $99 figure still circulating in comparison articles — including this catalog’s own Spellbook entry, pending its own refresh — should be treated as unverified.

The direction is the part that is safe to act on. The reported enterprise seat sits near $350 against the $179 Spellbook once published for Team. It went up and went quiet in the same twelve months.

What replaced Casetext costs about 3.2x Casetext

Casetext’s real product was never the model. It was the checkout: a solo attorney put in a card and was working that afternoon, with no Westlaw contract and no seat minimum. It sold from roughly $200/user/month, and that access is the thing nothing in this comparison inherits.

The closest live equivalent is Westlaw Advantage with CoCounsel Essentials, which Thomson Reuters prices at $639.20/user/month for a solo attorney on All States & Federal coverage at a one-year term, with published term discounts of 12% at two years and 18% at three. Online purchase is open only to firms of up to 10 attorneys. Above that it is a sales cycle.

So the research side went from $200 self-serve to $639.20 with a firm-size ceiling on the checkout, and the drafting side went from a published $99 to a demo form. Both halves lost the property that made this pairing interesting to small firms in the first place.

The workflows still barely overlap

The one thing the old page got right survives intact. Spellbook draws its authority from the contract in front of you; CoCounsel draws its authority from a case-law corpus. Associate widens Spellbook’s reach — it works a term sheet up into a full financing set, or runs inconsistency checks across hundreds of documents — but every document in that set is one you supplied. It does not tell you whether a case is still good law, and Spellbook does not claim it does.

That boundary is why a full-service firm still buys both, and why the double-spend objection never applied. What changed is the bill. Two seats that once totalled roughly $300/month now start near $990 if the reported Spellbook enterprise seat holds, before any minimum-seat commitment on either side.

Verdict

Pick Spellbook if the work is contract drafting, review, and playbook compliance — corporate, commercial, employment, in-house GC. Go in knowing you are entering a sales conversation rather than a checkout, and that the number you are quoted will not match the ones in circulation.

Do not pick Casetext. It has not been purchasable since April 1, 2025. Any shortlist, renewal model, or budget line still carrying a $200 Casetext seat is more than a year stale.

If research is the actual need, buy Thomson Reuters CoCounsel, and read Harvey vs Thomson Reuters CoCounsel before signing. That is the live platform bake-off this pairing used to stand in for.

If you cannot decide, buy Spellbook first. Drafting volume is where a transactional team’s hours actually go, the trial runs in days rather than a procurement cycle, and a research seat can be added later without rework. Reverse that order only if your matters already route through Westlaw.

If neither fits — the quote comes back above budget, or the firm has standardized on Google Docs — Ivo, Definely, and DraftWise attack contract review and drafting from different angles, and Spellbook vs DraftWise works that trade in detail. Guard: none of the three does primary-law research with citation validation, so anything headed for a filing still needs a KeyCite or Shepard’s check outside the tool.

Two things to watch

• Spellbook’s published prices are gone but not forgotten. Review sites, procurement spreadsheets, and this catalog’s own tool entry still carry $99 and $179 tiers that Spellbook stopped publishing. Guard: get the quote in writing before modelling seats, and re-check it at renewal — the reported move from $179 to a ~$350 enterprise seat happened inside a year.
• ACM is announced, not shipped. Spellbook lists an early-access waitlist for a system it describes as powering contracts end to end. Guard: buy Review, Draft, Compare, Ask, Playbooks, and Associate on what they do today, and keep any ACM capability out of the business case until it has a GA date.