PlaintiffStack vs ProPlaintiff

What ProPlaintiff does

ProPlaintiff was founded in 2023 in the Phoenix area by attorney Kristopher Rezagholi and Jason Turnquist. It sells AI case management to personal injury firms: a case dashboard that tracks timelines and delays, automations, AI calendar and deadlines, a client care app and texting, and drafting tools for demand letters, pleadings, motions, subpoenas and other documents. Its AI paralegal, Tiff, answers questions across the case files a firm uploads and cites its sources. ProPlaintiff also offers medical chronologies and analysis of video such as bodycam and surveillance footage.

It is lightly funded compared with the big AI vendors, with strategic angel backing on undisclosed terms, and it publishes a lot of comparison content.

Where ProPlaintiff is strong

• AI-first case management. Like PlaintiffStack, it puts case management and AI in one product rather than bolting AI onto an older system.
• PI breadth. Demands, chronologies, document generation and an assistant that works across the firm's files.
• Video analysis. Few plaintiff tools handle footage; ProPlaintiff does.
• Accessible to small firms. It has marketed to solos as well as larger firms.

Where PlaintiffStack differs

The two products are closer in shape than most on this list, so the differences are specific:

• Practice depth. ProPlaintiff lists many practice areas, but its product is built around PI. PlaintiffStack ships three full practices on California rules. Workers' comp has WCAB captions, ADJ numbers, a benefits audit covering TD periods, rates and late-payment exposure, a QME cover letter and records index, and WCAB petition drafting. Employment has a legal chronology, a wage and penalty audit and checks for deadlines after a right-to-sue notice.
• People accept what AI proposes. Agents propose facts, deadlines and tasks, each cited to its document, page and words, and none lands in a case until a person accepts it.
• Security commitments. PlaintiffStack signs a BAA with every firm before client data arrives and runs everything holding client data, models included, in one US AWS account. Its SOC 2 Type II and ISO 27001 are in progress, with no report yet. ProPlaintiff says it is HIPAA compliant and lists SOC 2 auditing without naming a report; ask both vendors for documents.

Where PlaintiffStack falls short: it supports California only, has no OCR (scans and faxes aren't read), no video analysis and no firm-wide AI chat across every file.

On a demo, ask each vendor to run the same cases from your own files: one with a treatment gap and one with a deadline close at hand. Watch how each surfaces the gap, where each fact comes from, and what a person has to approve before anything leaves the firm. PlaintiffStack's demo is 30 minutes on your own case types.

Pricing

ProPlaintiff's pricing page offered a demo rather than plans as of October 21, 2026; earlier third-party roundups reported per-seat plans starting at $99 a month. PlaintiffStack is $250 per case with every app included, no monthly fee and no long lock-in contract. AI usage is billed separately, with an estimated cost shown before each tool runs. Per-seat pricing favors small teams with many cases; per-case pricing favors firms that add staff as they grow. Our per-case vs per-seat pricing guide works through both.

Who should pick which

Pick ProPlaintiff if you're a PI firm, especially outside California, that wants an AI-first system with an assistant across all your files and video analysis. Pick PlaintiffStack if you're a California firm with workers' comp or employment cases, or you want per-case pricing and a BAA from day one. Both are young companies, so ask each for references and a data export plan. See also personal injury case management software.