Shortlist by what you need
Start here if you know why you are leaving Dioptra.
Want the closest match?
LexCheckMost similar to Dioptra in what it does, its category and its price.
Visit (opens LexCheck in a new tab)Need a free plan?
goHeatherHas a free plan, rated 4.0 out of 5. Dioptra has none.
Visit (opens goHeather in a new tab)Want the lowest price?
IvoFrom $500/mo, the lowest starting price here.
Visit (opens Ivo in a new tab)Want the best rated?
LinkSquaresRated 4.2 out of 5 in our review, against 3.7 for Dioptra.
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At a glance
Green means better than Dioptra, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 DioptraBaseline | 3.7 | Not listed | No | AI contract redlining that works from your own playbooks and previously executed contracts, rather than generic legal templates. | |
| LexCheck | 3.8+0.1 | Not listed | No | AI contract review that marks up agreements against your playbook inside Microsoft Word. | vs Dioptra |
 Mixus | 4.0+0.3 | Not listed | No | Email-based legal agents that draft and redline in Word, with attorney approval built in. | vs Dioptra |
| Ivo | 4.1+0.4 | $500/mo | No | Redlines contracts against a legal team's own playbook directly inside Microsoft Word | vs Dioptra |
 Superlegal | 4.0+0.3 | Not listed | No | AI-native law firm: contracts redlined by machine, then reviewed by an actual attorney. | vs Dioptra |
| goHeather | 4.0+0.3 | $99/mo | YesDioptra has none | Lawyer-trained AI that redlines contracts against a playbook and explains risk in plain English. | vs Dioptra |
| LinkSquares | 4.2+0.5 | Not listed | No | Contract lifecycle management that drafts, reviews and tracks agreements for legal teams. | vs Dioptra |
 Leah | 4.2+0.5 | Not listed | No | Agentic AI platform for contracting, legal, procurement and finance teams, formerly ContractPodAi, with domain agents, an agentic CLM that handles intake, review, redlining and renewals, and a builder for custom agent workflows. | vs Dioptra |
 Spellbook | 4.2+0.5 | Not listed | No | Drafts and redlines contracts directly inside Microsoft Word | vs Dioptra |
The alternatives in detail
In order of how closely each one matches Dioptra.
LexCheck
3.8Not listed
vs Dioptra+0.1
AI contract review that marks up agreements against your playbook inside Microsoft Word.
- LLM-powered contract review
- LexCheck Copilot running inside Microsoft Word
- Automated markup against negotiation standards
Runs where contracts are actually negotiated rather than in a separate portal
No public pricing - demo-led sales
Mixus
4.0Not listed
vs Dioptra+0.3
Email-based legal agents that draft and redline in Word, with attorney approval built in.
- Agents that operate inside email and Microsoft Word
- Redlining, analysis, drafting and model generation
- Attorney-in-the-loop approval on every output
Meets lawyers in email and Word rather than demanding a new platform
Value grows with volume of past work available to learn from
Ivo
4.1$500/mo
vs Dioptra+0.4
Redlines contracts against a legal team's own playbook directly inside Microsoft Word.
- AI contract redlining applied against a legal team's own playbook and precedents
- Works directly inside Microsoft Word rather than a separate review interface
- Built specifically for Fortune 500 and enterprise in-house legal teams
Playbook-driven redlining keeps output consistent with a team's actual negotiating positions
$6,000 per user per year is a real commitment with no visible lower-cost tier
Superlegal
4.0Not listed
vs Dioptra+0.3
AI-native law firm: contracts redlined by machine, then reviewed by an actual attorney.
- AI redlining with attorney review on every contract
- Risk flagging and market-standard edits
- Guaranteed 24-hour turnaround
A lawyer signs off, so the output is legal work product
No pricing published, only 'flat, scalable'
goHeather
4.0$99/mo
vs Dioptra+0.3Free plan
Lawyer-trained AI that redlines contracts against a playbook and explains risk in plain English.
- Contract redlining against built-in or custom legal playbooks
- Plain-English risk explanations tied to specific clauses
- Jurisdiction-aware review localized to the user's region
Free tier lets a user test a real contract before committing to a plan
Explicitly not a substitute for a lawyer, per the company's own disclaimer
LinkSquares
4.2Not listed
vs Dioptra+0.5
Contract lifecycle management that drafts, reviews and tracks agreements for legal teams.
- Contract drafting support
- Automated review against internal standards
- Obligation and renewal tracking after signature
Covers post-signature obligations, not just review
Pricing is not published and sales is demo-led
Leah
4.2Not listed
vs Dioptra+0.5
Agentic AI platform for contracting, legal, procurement and finance teams, formerly ContractPodAi, with domain agents, an agentic CLM that handles intake, review, redlining and renewals, and a builder for custom agent workflows.
- Agentic CLM for intake, review, approvals and renewals
- Playbook-driven redlining inside Microsoft Word
- Domain agents for legal, contracts, procurement and finance
One platform spans legal, contracting, procurement and finance
No public pricing; demo required
Spellbook
4.2Not listed
vs Dioptra+0.5
Drafts and redlines contracts directly inside Microsoft Word.
- Drafts contract language and flags risky clauses directly inside Microsoft Word
- Purpose-built for transactional contract drafting and negotiation
- No separate platform to learn, works inside an existing document editor
Works directly inside Microsoft Word, no new platform to adopt
Narrower scope than full-platform competitors, doesn't cover research or due diligence
FAQ
Questions people ask
Is Dioptra free?
Dioptra does not list a free plan. Check its pricing page for current plans.
What is the best free alternative to Dioptra?
goHeather is the highest-rated alternative here with a free plan (4.0 out of 5).
What is the cheapest alternative to Dioptra?
Among paid plans, goHeather has the lowest starting price (from $99/mo). If you need it free, start with goHeather.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.