The tax research AI that replaces your Checkpoint lookups.

Checkpoint makes you search. Marble reads the law for you — plain-English questions, citation-backed answers in seconds, across federal and all 50 states.
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Marble vs. Thompson Reuters Checkpoint

Checkpoint is a deep reference library built for keyword search. Marble is an AI research assistant that reads the law for you and returns cited answers in seconds.
 

Marble

Checkpoint

Ask tax questions in plain English
Keyword & boolean search
Citation-backed answers in seconds
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Click through to full primary source text
Draft and save memos, client emails & IRS responses
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Free, publicly searchable Tax Library
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Federal + all 50 states coverage
SOC 2; data never trains public models
Built exclusively for AI-native research
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Transparent self-serve pricing
Free Plan
Pro for $600/year
Custom enterprise

Tax teams are leaving the old way behind

Practitioners who switched from legacy research tools tell the same story: answers in seconds, not half an hour.

Stop searching. Start getting answers.

Try Marble free - no credit card required. See a cited answer to your toughest tax question in seconds.