UPDATE: There are a number of updates and clarifications below.
And much like the actual Mayweather-Pacquiao fight, one side was way more prepared for it.
Legalweek isn’t the sort of event that usually spawns an old-school rumble. It’s a bunch of tech geeks and lawyers gushing about efficiency and productivity. If there’s any event in the world more at risk to a swirlie attack, it’s this one. But somehow a throwdown emerged yesterday.

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It all began with ROSS Intelligence CEO Andrew Arruda hyping his latest announcement:
Going to be huge news at #LegalTechNY #LegalWeek18.
Stay posted. pic.twitter.com/D3Xa3cYLeB— ROSS (@ROSSIntel) January 28, 2018
It's going to be an absolute game changer.
— andrew arruda 🎸 (@AndrewArruda) January 28, 2018

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OK, you’ve got our attention. When the big announcement came — a product called EVA that uses artificial intelligence to assist litigators in writing briefs — Arruda literally dropped the mic.
The resulting thud was a metaphor for the reaction from tech observers wondering if this wasn’t just another version of Casetext’s CARA. Not that there’s anything wrong with multiple solutions occupying the same space — but it is kind of the opposite of a game changer.
That’s when Sarah Glassmeyer ignited a fire that would soon burn out of control.
https://twitter.com/sglassmeyer/status/958047817460781057
Because Casetext’s Jacob Heller was fully prepared to play Battlebots.
Bring it on! No better time/place than Legal Tech. @AndrewArruda how about 1pm tomorrow?
Hey @atlblog @Legaltech_news @bobambrogi, can you guys live steam?#RobotFight https://t.co/ZG6nfATUC5
— Jake Heller (@Jacob_Heller) January 29, 2018
Gauntlet thrown. Sounds like a fun diversion for a conference that can get a little repetitive. They could totally ham it up like a wrestling match.
There was just one problem.
Looks like @Casetext's #RobotFight offer was declined … speaks volumes. Proud to work with the team building the #legaltech of the future, used today by the country's best litigators. #CARA #LegalWeek18 #LegalAI @Jacob_Heller https://t.co/89l797HB7M
— Laura Safdie (@LSafdie) January 29, 2018
https://twitter.com/kimballdparker/status/958324654606708736
Casetext had some thoughts on the argument that CARA’s great disadvantage was that law firms would have to pay a fee for it:
.@casetext's @Jacob_Heller on @ROSSIntel's Eva being offered free: "for people that don’t have consistent access to @Westlaw or @LexisNexis, this is huge you can check when your brief is overturned." #Legalweek18 #LTNY18
— Rhys Dipshan (@R_Dipshan) January 30, 2018
To channel the late 90s… aw snap.
This is where the story would end under most circumstances. But Casetext decided they didn’t have to wait for ROSS to have tussle. Casetext just went ahead and set up EVA so they could run it head-to-head.
#RobotFight is on! CARA v. EVA. 1:30 at Bridges Bar at Hilton.
Theatrics aside, it will be a great way for all to learn about the differences between the two technologies.#Legalweek18 #LTNY18
— Jake Heller (@Jacob_Heller) January 30, 2018
.@AndrewArruda, last chance to join in! #RobotFight is happening! #LegalWeek18 https://t.co/E5oRe3VkET
— Casetext, Part of Thomson Reuters (@casetext) January 30, 2018
And so it was on. Bob Ambrogi livestreamed it and you can read his breakdown over here and watch it below. As bar fights I’ve witnessed go, it involved way fewer broken shards of glass wielded as weapons (UPDATE: Apparently the video isn’t embedding properly. You can watch it here)
But that doesn’t mean there wasn’t a little shade (UPDATE: Heller pointed out on Twitter that he wasn’t trying to throw shade. But it certainly sounded that way to this reporter):
.@Jacob_Heller on how @casetext is different from @ROSSIntel's EVA platform: "The major difference is you will find things that are relevant to you and things you are working on" #Legalweek18 #LTNY18
— Rhys Dipshan (@R_Dipshan) January 30, 2018
Or, a lot of shade:
.@casetext Co-founder had some strong words for @ROSSIntel 's newly released Eva case analysis platform #robofight #legalweek18 #LTNY18 pic.twitter.com/hTTRQ81RPt
— Rhys Dipshan (@R_Dipshan) January 30, 2018
EVA didn’t help itself with this announcement right in the midst of the fight:
Case search purely by name right now is experiencing some difficulties. If you want to find the case quickly however just use the case citation for now!
— EVA Status (@EVA_Status) January 30, 2018
Yikes.
Aside from the ludicrousness of gathering around some computers in a hotel bar, Adam Ziegler’s post hits the nail on the head about the whole affair:
Even apart from the gamesmanship, this @casetext CARA v. @ROSSIntel EVA 'head-to-head' video is fascinating https://t.co/H1Y6i1ynkn; I love the open, enthusiastic engagement; maybe someone should host a legal research innovation olympics?
— Adam Ziegler (@abziegler) January 30, 2018
Before the battle, Arruda did some work managing expectations for his game changer.
Glad you are enjoying EVA – REMEMBER! EVA is less than two months old, you'll be able to see how much better EVA gets in the coming days, weeks, months & years!
Be sure to share EVA with your #lawyer friends – the word has to spread in #legaltech & #law beyond #legalweek18! 🚀 https://t.co/GO27a1e57t
— andrew arruda 🎸 (@AndrewArruda) January 30, 2018
Arruda’s point is worth remembering. Casetext’s CARA has reached a stage of maturity that a two-month-old platform could never match. But EVA has time. It’ll work out the lumps and, you know, figure out how to search by case name. A year from now we’ll have all forgotten EVA’s early days.
Except he had to go and call it a game changer… (UPDATE: Arruda told me he meant “game changer” to refer to the fact that the system will be free, bridging the access to justice gap.)
https://twitter.com/sglassmeyer/status/958117893115449344
Bulls**t Sarah. This blood is on your hands.
Robot Fight: Casetext’s CARA vs. ROSS’s EVA [Lawsites]
Joe Patrice is an editor at Above the Law and co-host of Thinking Like A Lawyer. Feel free to email any tips, questions, or comments. Follow him on Twitter if you’re interested in law, politics, and a healthy dose of college sports news.