OpusLaw vs Plexus
OpusLaw
opuslaw.orgPlexus
plexus.coSide by side
| Figure | OpusLaw | Plexus |
|---|---|---|
| Price from | $9.99/mo | — |
| Free plan | — | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| Plans published | 4 | 1 |
| Spec score · Legal AI Software | 7.0 (#28) | 8.0 (#10) |
| Integrations | The FAQ says Carta AI integrates with common practice management and document management platforms, with enterprise integrations for custom workflows. | Plexus offers Microsoft Word and Outlook add-ins that connect contract and matter work to those applications. |
| Intended users | OpusLaw describes its tools as designed for legal professionals and highlights law firms, solo attorneys, in-house counsel, and litigation users. | Plexus describes its platform as serving in-house legal teams and business teams including marketing, operations, procurement, and sales. |
| Product | OpusLaw provides legal AI for research, analysis, drafting, and practice management across jurisdictions. | Plexus is an AI-powered legal platform covering contract management, matter management, marketing and promotion compliance, reporting, and legal AI. |
| Security | OpusLaw says data is encrypted in transit and at rest, confidential data is not used to train its AI, and matters remain isolated. | Plexus states that its information security management system is ISO 27001:2022 certified and that it is GDPR compliant. |
| Support | Listed plan support ranges from email and priority support to dedicated support; the about page says every subscriber receives support. | Marketing Wizard includes onboarding, training, and dedicated customer success support; the page says most teams can be configured and live within days. |
Plans
OpusLaw
- Carta Actus$9.99 a month
- Carta Corpus$29.99 a month
- Carta Magistra$79.99 a month
- Carta Suprema$149.99 a month
In their own words
Plexus
Plexus is an AI-powered legal platform for in-house legal teams and the business groups they support. It combines contract and matter management with marketing and promotion compliance, reporting and legal AI. Contract workflows cover creation, negotiation, approvals, e-signatures, and reminders for renewals and milestones. Its AI can review and summarize contracts, identify risks or missing clauses against legal playbooks and policies, and answer document questions with context and suggested next steps. Matter Management tracks legal requests from intake through execution. Marketing Compliance helps teams review creative, while Promotion Compliance can generate campaign terms and permits. Word and Outlook add-ins connect contract and matter work to those applications; the platform also describes integrations with commonly used CRM systems, e-signature providers and document repositories. Plexus states that it is ISO 27001:2022 certified and GDPR compliant. It offers a free trial with full platform access and no credit card requirement, but gives no trial duration. Pricing is available on request and scales with legal team size.