Casetext vs Lexis+ AI:Which is more popular?
In September 2026, Lexis+ AI had more branded searches than Casetext among legal research platforms worldwide. Lexis+ AI had about 16,500 branded searches, while Casetext had 6,600. Lexis+ AI made up 2.3% of all legal research platform searches we track, and Casetext accounted for 0.92%. When we asked ChatGPT and Google AI Overviews about legal research platforms, Lexis+ AI appeared in four of the five answers and Casetext in two. Lexis+ AI was mentioned before Casetext in four out of five answers.
Who do people search for more?
Lexis+ AI, about 3 searches for every 1 for Casetext
Who does AI mention more?
Lexis+ AI, mentioned in 4 of 5 answers, Casetext in 2
Who does AI recommend more?
Lexis+ AI, named ahead of Casetext in 4 of 5 answers
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Top legal research platforms in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Lexis+ AI was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Casetext was mentioned in two out of five: not in any of the three ChatGPT answers, but in both Google AI Overviews. Lexis+ AI was listed before Casetext in four out of five answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Westlaw1st
Bloomberg Law2nd- Lexis+ AI3rd
- LexisNexis4th
Fastcase5th
CourtListener6th
vLex7th
Justia8th- Casetext9th
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- LexisNexis5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Westlaw5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Bloomberg Law5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Lexis+ AI4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Fastcase4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- CourtListener3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- vLex2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Justia2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Casetext2 of 5Named in 0 of 3 ChatGPT answersNamed in 2 of 2 Google answers
See every answer about legal research platforms
5 answers
Asked ChatGPT
“Which legal research platform should I use?”
Asked ChatGPT
“What are the best legal research platforms?”
Asked ChatGPT
“What's the best legal research platform for a law firm?”
Searched Google, AI Overview
“legal research platforms”
Searched Google, AI Overview
“legal research software”
Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.
Is Casetext or Lexis+ AI more popular in search?
This chart shows how often people search Google for Casetext and Lexis+ AI by name. Each line represents a brand's share of searches for all nine legal research platforms we track, month by month, from English-language searches worldwide.
Share of searches by month for Lexis+ AI, Casetext. The figures are in the table below the chart.
View monthly share of searches table
| Month | LexisNexis | Westlaw | vLex | CourtListener | Justia | Lexis+ AI | Bloomberg Law | Casetext | Fastcase |
|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 41.8% | 41.8% | 6.9% | 1.7% | 2.5% | 2.4% | 1.7% | 0.75% | 0.5% |
| Nov 2025 | 44.3% | 36.2% | 8.9% | 2.2% | 2.7% | 2.5% | 1.8% | 0.97% | 0.43% |
| Dec 2025 | 44.7% | 36.5% | 7.4% | 2.7% | 3.3% | 2.1% | 1.8% | 0.98% | 0.53% |
| Jan 2026 | 44.7% | 36.6% | 7.4% | 3.3% | 2.7% | 2.1% | 2.2% | 0.65% | 0.43% |
| Feb 2026 | 47.1% | 31.5% | 6.3% | 5.2% | 4.2% | 2.2% | 2.3% | 0.84% | 0.37% |
| Mar 2026 | 48.5% | 32.4% | 8% | 2.9% | 2% | 2.9% | 2.4% | 0.47% | 0.47% |
| Apr 2026 | 47.4% | 31.6% | 9.5% | 3.5% | 2.3% | 3% | 1.6% | 0.57% | 0.46% |
| May 2026 | 47.6% | 31.8% | 9.6% | 3.5% | 2.3% | 2.6% | 1.6% | 0.46% | 0.46% |
| Jun 2026 | 46.8% | 31.3% | 11.5% | 3.5% | 1.9% | 2.7% | 1.5% | 0.45% | 0.37% |
| Jul 2026 | 49.8% | 27.3% | 12.2% | 3.7% | 2% | 2.5% | 1.6% | 0.31% | 0.48% |
| Aug 2026 | 49.4% | 33% | 6.6% | 3.6% | 2% | 2.5% | 2% | 0.26% | 0.59% |
| Sep 2026 | 42% | 34.3% | 12.6% | 3.1% | 2.5% | 2.3% | 1.7% | 0.92% | 0.5% |
How has the Casetext and Lexis+ AI comparison changed over the last 12 months?
3 findings
- Lexis+ AI was ahead of Casetext in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Casetext’s share of searches among legal research platforms worldwide moved from 0.75% to 0.92%, and its estimated monthly branded searches held steady at 6.6K.
- Across the 12 months ending September 2026, Lexis+ AI’s share of searches among legal research platforms worldwide moved from 2.4% to 2.3%, and its estimated monthly branded searches moved from 21K to 16.5K.
How did search popularity change for legal research platforms worldwide in September 2026?
3 changes
In September 2026, Casetext overtook Fastcase to rank 8th among legal research platforms worldwide, with 0.92% of the searches.
In September 2026, Justia overtook Lexis+ AI and Bloomberg Law to rank 5th among legal research platforms worldwide, with 2.5% of the searches.
Estimated monthly branded searches for Lexis+ AI worldwide fell 21.4% over 12 measured months, from 21K to 16.5K in September 2026.
How are branded searches counted?
3 search terms
Brandwave collects information about searches that people make online using Casetext’s and Lexis+ AI’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
Other head-to-heads among legal research platforms
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