What is the best AI patent drafting tool in 2026?

It depends on your practice. For European and EPO-centric work with confidentiality constraints, 23VIP is the strongest fit: it covers claims, specifications, drawings, office action responses, prosecution analysis, and patentability opinions, drafts to European practice standards, offers an EU-hosted model option, and publishes its pricing. For US corporate teams wanting a Microsoft Word add-in with bundled FTO and invalidity analytics, DeepIP is a strong choice. Solve Intelligence suits firms that prefer a browser-based drafting editor with claim charting.

How much does AI patent drafting software cost?

Most vendors do not publish pricing. Third-party comparisons report DeepIP at roughly $350-420 per user per month and Solve Intelligence at roughly $9,300 per user per year. 23VIP publishes its pricing: 199 EUR per attorney per month (or 1,999 EUR per year) for unlimited use of all three tools, or pay-per-use day passes from 40 EUR with no subscription required.

Is it confidential to use AI for patent drafting?

Purpose-built patent AI tools use business terms under which models do not train on your data. If your clients or firm require that unpublished disclosures never leave the EU, 23VIP is currently the only tool in this comparison offering an EU-hosted open-source model option in addition to frontier models.

Can AI draft EPO-compliant patent applications?

Yes, if the tool is built for European practice: two-part claim form where appropriate, support for the problem-solution approach, and discipline on added matter under Article 123(2) EPC. 23VIP was built European-practice-first; DeepIP strengthened its European coverage by acquiring PatentMaker in 2026; most other tools are US-centric.

Best AI Patent Drafting Tools in 2026: An Honest Comparison

Last updated: 3 August 2026

The best AI patent drafting tool depends on your practice: 23VIP for European/EPO-centric work with strict confidentiality needs, DeepIP for US corporate teams that live in Microsoft Word, and Solve Intelligence for firms that prefer a browser-based editor. This guide compares six leading tools on the criteria attorneys actually decide on — drafting approach, jurisdictional depth, confidentiality, pricing transparency, and how easy each is to try.

Full disclosure: this comparison is published by 23VIP. We keep it factual, cite third-party sources for competitor pricing, and say plainly what each competitor does well — including where they beat us. Most "best tools" lists in this niche are written by vendors who rank themselves first on every axis; we would rather you trust the table below.

Comparison Table

Tool	Editor / workflow	European (EPO) depth	Model hosting & training	Pricing	Trial
23VIP	Web apps covering claims, specifications, patent drawings, office action responses, prosecution analysis, and patentability opinions	Built European-practice-first; also supports USPTO and other jurisdictions	Choice of EU-hosted open-source models or frontier models (Gemini, GPT, Claude); no training on user data	Published: €199/attorney/month (all tools), €1,999/year, or day passes from €40	Free trial, no sales call
DeepIP	Microsoft Word add-in for drafting and prosecution; FTO/invalidity analytics modules sold alongside	Strengthened in 2026 via acquisition of Munich-based PatentMaker	Fine-tuned GenAI models; zero-retention terms; no EU-hosted open-source option advertised	Not published; reported at ~$350–420/user/month by third parties	Trial via demo request
Solve Intelligence	In-browser document editor; drafting, prosecution, claim charts	Multi-jurisdiction support; organisation and go-to-market are US-centric	Cloud-hosted; no-training business terms	Not published; reported at ~$9,300/user/year by third parties	Via demo request
Patlytics	End-to-end platform: drafting, prosecution, office actions, infringement/FTO analytics	US-focused	Enterprise cloud	Not published; enterprise sales	Via demo request
Patentext	Software combined with registered patent-agent services	US-focused	Cloud-hosted	Published tiers on its site	Yes
Qthena	All-in-one prosecution workspace inside the Questel ecosystem	EPO/EUIPO/USPTO file retrieval; oriented to IP management, not drafting-first	Enterprise SaaS (ipQuants AG, Switzerland)	Not published; sold through Questel	Via Questel sales

Competitor pricing figures are third-party reports (see eliteai.tools and Patentext's comparison), current as of August 2026. Verify with each vendor.

1. 23VIP — best for European practice and confidentiality-critical work

23VIP covers the core patent work end to end: complete applications and claims, patent drawings with automatic reference numbering (via Claim Drafter), and office action responses, prosecution analysis, and patentability opinion reports — with or without an office action on file (via Reply Drafter). Everything is drafted with the structure and rigor of European patent practice: two-part claims where appropriate, problem-solution-aware argumentation, and Article 123(2) added-matter discipline. It also drafts for the USPTO and other jurisdictions, but the European DNA is the differentiator — every other tool on this list started from US practice.

Three things set it apart. First, model choice: run drafting on open-source models hosted in the EU by European providers when a disclosure cannot leave the EU, or on frontier models (Gemini, GPT, Claude) under terms that prohibit training on your data. Second, transparent pricing, published on the site: €199/attorney/month (€1,999/year, about 2 months free) for unlimited use of all three tools, or pay-per-use day passes from €40 with no subscription — against the $4,000–9,000 per seat per year reported for the incumbents. Third, a free trial without a sales call.

Honest limitations: 23VIP does not do freedom-to-operate or invalidity search analytics, portfolio management, or litigation claim charting. If you need those in the same product as your drafting tool, look at DeepIP or Patlytics.

2. DeepIP — best for US corporate teams working in Microsoft Word

DeepIP is a Microsoft Word add-in for drafting and prosecution, with FTO and invalidity analytics modules sold alongside, and strong adoption among US law firms and in-house teams. If your attorneys refuse to leave Word, DeepIP's integration is genuinely its killer feature. Its chemistry-specific functionality (Markush structures, stereochemistry) is also ahead of the field. In 2026 it acquired Munich-based PatentMaker to strengthen European coverage.

Trade-offs: pricing is not published (third parties report ~$350–420/user/month), trials go through a sales demo, and the platform's breadth can be more than a drafting-focused practice needs.

3. Solve Intelligence — best for browser-based drafting with claim charts

Solve Intelligence (Y Combinator S23, $55M raised from investors including Microsoft and Thomson Reuters) wraps AI drafting in a purpose-built browser editor with patent-specific UI: navigate sections, manage claim dependencies, and watch changes propagate. Its claim-charting product (launched with the Series B) and the 2026 Palito.ai acquisition extend it toward litigation. It reports 600+ IP teams as customers.

Trade-offs: the highest reported per-seat cost in the category (~$9,300/user/year per third-party reports), no published pricing, demo-gated access, and a US-centric orientation.

4. Patlytics — best for enterprise teams wanting drafting plus analytics

Patlytics connects drafting, prosecution, office action analysis, infringement, FTO, and portfolio workflows in one platform, with strong US litigation-firm adoption. If your team's pain is spread across the lifecycle rather than concentrated in drafting, it deserves a look.

Trade-offs: enterprise sales motion, no published pricing, US-focused.

5. Patentext — best if you want software plus human patent-agent services

Patentext pairs its drafting software with registered patent-agent services — a hybrid model built from a decade of drafting experience at US firms. It publishes pricing tiers, which we respect: this category needs more of that.

Trade-offs: newer product (launched 2025), US practice orientation, and the service component may not fit firms that only want software.

6. Qthena — best for teams already inside the Questel ecosystem

Qthena (built by ipQuants, distributed by Questel) is less a drafting tool than an AI-powered prosecution workspace: it retrieves file data from the EPO, EUIPO, and USPTO, centralizes documents, and adds AI chat and workflow automation over them. For corporate IP departments already using Questel's services, it's a natural add-on.

Trade-offs: sold through Questel's sales channel, no published pricing, and drafting is not its center of gravity.

How to Choose

European/EPO practice, or clients with EU data requirements: 23VIP. No other tool offers an EU-hosted model option.
US corporate team that won't leave Microsoft Word: DeepIP.
Browser editor and claim charting: Solve Intelligence.
Lifecycle analytics beyond drafting: Patlytics.
Software plus human drafting support: Patentext.
Questel customer wanting AI over your existing IP data: Qthena.
Solo attorney or small firm watching cost: 23VIP or Patentext — the only two with published pricing. 23VIP is €199/attorney/month all-in, and its day passes mean you can start with no per-seat commitment at all.

For a deeper look at the head-to-heads, see 23VIP vs DeepIP, 23VIP vs Solve Intelligence, and DeepIP alternatives. For how to evaluate any tool on ethics and security, read our Attorney's Guide to AI Patent Drafting.

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