PlaintiffStack vs EvenUp

What EvenUp does

EvenUp started in 2019 with AI-drafted demand letters for personal injury firms and has grown into the largest AI vendor in the category. Its product list now covers demands (Express and Expert), medical chronologies, case and negotiation prep, a settlement repository, Communication Agents that call providers and carriers, and Companion, an assistant EvenUp describes as a firmwide operating center. In May 2026 it launched Pre-Litigation as a Service (PLAAS), which pairs its AI with EvenUp's own US-based case managers to run claim setup, treatment tracking, records retrieval, demands, carrier negotiation and, optionally, lien resolution. In September 2026 LexisNexis and EvenUp announced an alliance that puts Protégé research inside Companion.

EvenUp says it is used by 30% of the top 100 PI firms and handles more than 10,000 cases a week. It raised a $150M Series E in October 2025 at a valuation over $2B, bringing its total to $385M.

Where EvenUp is strong

• Depth in one practice. EvenUp has focused on personal injury for years, and the company says its model is trained on a large body of injury cases and medical records.
• People behind the AI. EvenUp has said openly that it combines AI with human review. In late 2024 Business Insider reported former employees' accounts that people did much of the work and that the AI had made errors; EvenUp's response was that using people and AI together is a feature that protects accuracy.
• Capacity on demand. PLAAS lets a firm add pre-lit capacity without hiring. For a firm short on case managers, that is a real option.
• Fits existing systems. EvenUp lists integrations with Litify, SmartAdvocate and CASEpeer, so a firm can keep its case management system.

Where PlaintiffStack differs

PlaintiffStack is the case management system itself, with AI case tools inside it, for personal injury, workers' comp and employment. Your staff run the case; agents propose facts, deadlines and tasks, and a person accepts each one. Every proposed fact cites the document, page and words it came from. Drafts like the policy-limits demand letter wait for review, and nothing goes to a carrier until a person sends it. See Draft and Case watch.

It is also narrower and younger than EvenUp, and you should weigh that:

• California only. Phases, pages, deadlines and morning checks follow California rules, such as time-limited demands under CCP 999. Other states aren't supported.
• No OCR yet. Agents read searchable PDFs, Word and text files. Scanned records and faxes aren't read. EvenUp processes the records firms send it as part of its service.
• No outsourced staff. PlaintiffStack doesn't do the work for you the way PLAAS does.
• No track record at scale. PlaintiffStack is new and doesn't publish customer counts.

Pricing

EvenUp's prices aren't public. It moved to per-case pricing in 2025 and sells PLAAS as a subscription. Third-party and competitor estimates put a standard demand around $300 and $500-$800 or more with add-ons; ask EvenUp for a written quote rather than relying on those. PlaintiffStack charges $250 per case with every app included and no monthly fee. AI usage is billed separately: each tool shows an estimated cost before it runs, and how usage is billed is part of your quote. Our guide to AI demand letter costs and per-case vs per-seat pricing walk through the math, and pricing has the details.

Who should pick which

Pick EvenUp if you are a PI firm that wants a proven demand engine or an outside team to carry pre-lit work, especially at large volume or outside California. Pick PlaintiffStack if you are a California firm that wants one system for PI, workers' comp and employment, wants its own people to own the work, and prefers a flat per-case price. Some firms will use both, though there is no direct connection between the two today. For a wider view, see EvenUp vs Supio, EvenUp vs Eve and the best AI for personal injury lawyers.