Decision Support · Side-by-side

CaseText CoCounsel vs Diligen. Side by side.

Compare pricing, strengths, and use cases so it is easier to pick the right fit.

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CaseText CoCounsel

Diligen

Best overall

For most legal professionals, Diligen is the more practical choice due to its user-friendly interface and fast document review, while CaseText CoCounsel wins on citation accuracy for deep legal research. The single biggest difference is that CoCounsel is built for litigation research with Westlaw integration, whereas Diligen excels at contract and due diligence review for transactional work.

CaseText CoCounsel

#999 of 3,826 Web

Diligen

#4552 of 3,826 Web

Scores at a glance

CaseText CoCounselDiligenPractical Versatility

Onboarding Ease

Ecosystem Fit

Market Value

Choose CaseText CoCounsel if

You are a litigation attorney who needs to find and cite the exact case law for a motion or brief
You work at a mid-to-large law firm that already uses Westlaw and can afford premium tools
You need to generate deposition outlines or case timelines from a pile of documents
You require SOC2 Type II security for government or highly regulated client work

Choose Diligen if

You are a corporate lawyer or paralegal reviewing hundreds of contracts for a merger or acquisition
You need to extract specific clauses (like indemnification or termination) from leases or agreements
You want a tool that your whole team can learn in an afternoon without a training course
You handle regulatory compliance audits and need to flag risky language fast

Key differences

CaseText CoCounsel is built for litigation research; Diligen is built for contract and due diligence review
CoCounsel integrates with Westlaw; Diligen integrates with iManage and NetDocuments
CoCounsel has a steeper learning curve (10-step onboarding); Diligen is more beginner-friendly
Neither tool has a mobile app – both are desktop-only
CoCounsel focuses on citation accuracy; Diligen focuses on clause extraction speed
Pricing is unclear for both, but CoCounsel is generally considered more expensive for small firms

Facts side by side

	CaseText CoCounsel	Diligen
Free plan
Mobile app
API access

CaseText CoCounsel: strengths & weaknesses

Unmatched citation accuracy for legal research – you can trust the cases it finds
Direct integration with Westlaw gives you access to a massive legal database
SOC2 Type II certified, so your client data is secure
Can generate legal briefs and timelines from your documents
No mobile app – you can't use it on your phone or tablet
Expensive and pricing is not transparent – small firms may be priced out
Steep learning curve – you'll need training to write effective prompts
No API or integrations with common tools like Microsoft Office or Google Workspace

Diligen: strengths & weaknesses

Very easy to use – legal teams actually adopt it without much fuss
Fast processing of large document batches – great for due diligence
Pre-trained clause library with 700+ models saves you setup time
SOC2 compliant and secure for sensitive contracts
No mobile app – you can't review contracts on the go
Expensive for small boutique firms – pricing is not published
Requires high-quality scanned documents for best accuracy
Limited public API documentation if you want to build custom integrations

Common questions

Is CaseText CoCounsel better than Diligen for contract review?

No, Diligen is better for contract review because it specializes in clause extraction and due diligence with a pre-trained library of 700+ clauses. CoCounsel is better for legal research and drafting briefs.

Can I use Diligen or CaseText CoCounsel on my phone?

No, neither tool has a mobile app. Both are designed for desktop use only, so you'll need a laptop or computer to use them.

Which tool is easier for a non-technical lawyer to start using?

Diligen is easier. Its interface is user-friendly and you can start reviewing contracts within a few hours. CaseText CoCounsel requires training on prompt engineering and a multi-step setup.

Are these tools worth the price for a solo practitioner?

Probably not. Both tools have unclear pricing and are aimed at mid-to-large firms. Solo practitioners may find them too expensive and should consider cheaper alternatives like ChatGPT with legal plugins or free tools.

Which tool is more secure for sensitive legal documents?

Both are SOC2 Type II compliant, so they meet high security standards. CaseText CoCounsel also offers SSO via Azure AD, which may be preferred by enterprise firms.

Diligen wins for everyday contract review ease; CaseText CoCounsel wins for deep legal research accuracy.

If you're a litigation attorney who lives in Westlaw, CaseText CoCounsel is your best bet for accurate research. But for most everyday legal work like contract review, due diligence, and compliance audits, Diligen is easier to use and gets you results faster. Start with Diligen if you want to see value on day one.

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Detail pages: CaseText CoCounsel · Diligen

CaseText CoCounsel

Diligen

Free plan

Mobile app

API access