Buyer's guide
Best AI patent drafting tools in 2026
By Mahish Guru, Co-founder and CEO, PatentAssist.ai
Last updated
How we compared: we read each vendor's public website and documentation on 26 October 2026 and list only what they state there. PatentAssist facts come from this site. Prices are as published on that date. Disclosure: PatentAssist makes one of the products compared.
Start with the offices you file at: a tool that drafts well for the USPTO may not know EPO claim form or a German DPMA filing. Then check where your data is processed, whether you can see the price before a demo, and whether you can try it on a real disclosure. The table compares twelve tools on those points.
Quick answer
- What it costs: of the tools that publish prices, ClaimMaster (a Word add-in) runs $20 to $90 per user a month, PatentAssist $29 or $90 a month, Patent Bots $702 a year per practitioner and IP Author $4,800 a year per tool. Solve Intelligence, DeepIP, Patlytics, IPRally and XLScout quote after a demo.
- Affordable for solo attorneys: PatentAssist (from $29 a month, 7-day self-serve trial), ClaimMaster and Patent Bots.
- USPTO and EPO formats: PatentAssist (plus DPMA and IP India), Solve Intelligence, DeepIP, IPRally, IP Author and Rowan Patents.
- Built-in prior art search: PatentAssist, Solve Intelligence, IPRally and XLScout.
- Data location and security: Solve Intelligence and XLScout let you choose US or EU processing, IPRally runs dedicated EU and US environments, IP Author keeps EU customers in EU regions, and PatentAssist runs its AI in the EU. DeepIP, Patlytics and Solve state SOC 2 Type II and ISO 27001. ClaimMaster runs in Word and calls only the model you configure, including a private or local one.
Our pick for US and European patent teams
PatentAssist.ai
One invention disclosure in, a complete draft out, in USPTO, EPO, DPMA (in German) or IP India format. The claims are written first, drawings are generated from them and AI patent search sits in the same workspace. Prices are on the website and the trial starts without a sales call.
- Four office formats from one disclosure: USPTO, EPO, DPMA (in German) and IP India
- Claims first, then the full specification, abstract, figure descriptions and drawings
- Search-informed drafting, with AI agentic patent search and patentability reports in the same workspace
- Public prices from $29 a month and a 7-day free trial you can start today
- AI processing in the EU, a GDPR DPA for every account, and no training on your content
AI patent drafting tools compared
| Tool | Drafting formats (US, EP, DE, IN, other) | EU data, GDPR and security | Pricing (as of 26 October 2026) | Free trial | Office action responses | Word add-in or web app | Drawings |
|---|---|---|---|---|---|---|---|
| PatentAssist.ai | US (USPTO), EP (EPO), DE (DPMA, delivered in German with German headings) and IN (IP India provisional and complete specifications, with the Form 2 first page) | Every AI request runs on Azure OpenAI in the EU (Sweden Central, Italy North); the app and its files are hosted in Azure Central India. A GDPR Article 28 DPA covers every account, the full sub-processor list is public, and your content never trains a model | Published: Lite $29/month, Pro $90/month, every feature on both; Enterprise quoted | Self-serve: 7 days, 300 credits, every feature, no sales call | IP India FER responses (Beta); USPTO support in development | Web app with a dedicated drafting editor and .docx export. Interface in English, German, Spanish and French | Figure plans, reference numerals and rendered patent drawings (Beta), plus figure descriptions |
| Solve Intelligence | Drafting page names "USPTO, EPO, PCT and more"; no DPMA or IP India format named | Customer chooses US or EU processing; only US or EU sub-processors. SOC 2 Type II and ISO 27001 (ISO 42001 in progress). No training on customer data | Pricing on request | Demo; no public free trial found | Yes: office action analysis and response drafting | Web app; templates compatible with Microsoft Word | Full figures from scratch, sketches or CAD files |
| DeepIP | Drafting page names USPTO, EPO and PCT; a homepage FAQ on formal requirements also lists DPMA, IPO, JPO, CNIPA, KIPO, UKIPO and others | Lists SOC 2 Type II, ISO 27001, ISO 42001, GDPR and German § 203 StGB. No retention or training on client data. No EU hosting option stated | Pricing on request | Free trial on request (form, work email) | Yes, with case-law citations | Microsoft Word add-in, plus Outlook, docketing integrations and an API | Sketch or photo to line art; flowcharts and sequence diagrams from method steps |
| IPRally | Global, EPO and USPTO drafting styles; drafts in eight languages, including German, French and Italian | Dedicated EU and US Google Cloud environments, so data stays in the region you need. ISO 27001 and SOC 2 Type II. Nothing searched or drafted is used to train a model | Annual per-seat subscription; price on request | Trial on a real case, arranged after a demo | Not yet: a prototype module only | Web app; exports Word and PDF | Generates figures from the draft text (processes as flowcharts); chemical structures from SMILES |
| Patlytics | No patent office named; says "tailored output per jurisdiction" | SOC 2 Type 2, ISO 27001 and ISO 42001; GDPR listed. No hosting region or data residency option published. No training on customer data | Pricing on request (demo) | Demo | Yes: claim amendments and arguments | Web platform | Not listed as an output |
| XLScout Drafting LLM | US and JP formats (more announced); no EP format | Choice of US or EU servers; GDPR compliant; SOC 2 Type II. No training on customer data | Pricing on request | Free trial on request (form) and demo | Described in an XLScout blog article, not on the Drafting LLM page | Web app with a Word-like editor | Only flowcharts and block diagrams |
| PatentPal | No patent office or drafting format named | No GDPR, EU hosting or certification statement found; its privacy policy says patent documents are processed in memory | Not published on its website | Self-serve free trial | Not listed | Web app; exports to Word, Visio and PowerPoint | Only flowcharts and block diagrams |
| IP Author | "Support for USPTO and EPO available for now" (pricing page); its drafting page says PCT-specific drafting is not supported | EU customers' data stored and processed in EU AWS regions; SOC 2 Type II; zero-training guarantee | $4,800/year per tool; $9,590/year for drafting + office actions; 12-month term | 14 days | Yes: USPTO and EPO office actions | Web app; search, FTO and office action analysis also inside ChatGPT and Claude (drafting stays in the web app) | Only flowcharts and block diagrams (editable) |
| ClaimMaster | USPTO (forms, paragraph numbering, file wrapper downloads); no EP or other drafting format | Runs locally in Word; AI calls go only to the LLM you configure, including private or local models. Says GDPR compliance is the customer's responsibility. No certification stated | $20–$75 per user per month billed annually, $24–$90 billed monthly, depending on edition and add-ons | 30 days, no card required | Office action shells; with the Drafting add-on, your configured LLM analyses USPTO rejections and suggests arguments or amendments | Microsoft Word add-in, runs locally | Figure templates and flowcharts from method claims; no AI drawing generation |
| Patent Bots | USPTO-oriented (USPTO forms, IDS, Patent Center login); no EP drafting format | All servers in the United States; SOC 2 Type II. Documents are not stored or used for AI training | Individual $702 per person per year (registered practitioners at law firms); law-firm pricing by calculator, with a $100/month or $400/year minimum; company pricing by portfolio size | Two weeks, work email required | Yes: office action response drafting and shells | Microsoft Word add-in plus web tools | Suggests figures; rule-based flowcharts in PowerPoint or Visio |
| Qthena (Questel) | No drafting format named | Questel (Paris) and ipQuants (Switzerland). Hosting infrastructure certified to ISO 27001 and SOC 2; zero data retention. No hosting region stated | Pricing on request (Essential, Advanced, Premium plans) | Demo only | Yes: draft responses | Web app | Drawing generation included in the Advanced and Premium plans |
| Rowan Patents (Clarivate) | Templates for United States and European drafting requirements; USPTO amendment markup | Local and cloud AI models; no GDPR, hosting or certification statement on the product page | Pricing on request | Demo only | Office action shells and a Rejection Navigator; AI response drafting not stated | Desktop application | Built-in drawing tool with synced numbering; AI flowchart generation |
PatentAssist publishes this guide. Details of other tools come from their own websites, checked 26 October 2026. Prices in US dollars as published by each vendor. "Pricing on request" means no price is public. Certifications and data locations are as each vendor states them; ask for the certificate or DPA before you rely on it.
The 12 tools, reviewed
1. PatentAssist.ai Our pick
Best for: Patent attorneys, firms, in-house teams and startups drafting for the USPTO, EPO, DPMA and IP India
PatentAssist turns an invention disclosure into a complete first draft. It autofills the disclosure form and writes the claims first. Then it drafts the description, abstract and figure descriptions around them in USPTO, EPO, DPMA or IP India format, ready to export as .docx. DPMA drafts arrive in German with German headings and no paragraph numbering, as the DPMA expects. Every draft is search-informed: AI agentic patent search and patentability reports run in the same workspace, so you can shape the claims around the prior art before you file. It also generates patent drawings (Beta) from the claims and has an AI copilot for edits mid-draft. Prices are public and every plan includes every feature; the plan only sets your monthly credits (300 or 1,500).
Why it's our pick
- Four office formats from one disclosure: USPTO, EPO, DPMA (in German) and IP India
- Claims first, then the full specification, abstract, figure descriptions and drawings
- Search-informed drafting, with AI agentic patent search and patentability reports in the same workspace
- Public prices from $29 a month and a 7-day free trial you can start today
- AI processing in the EU, a GDPR DPA for every account, and no training on your content
- Free patent search across USPTO, EPO and IP India at search.patentassist.ai
2. Solve Intelligence
Best for: Firms that want drafting, prosecution and invalidity, FTO and infringement charts on one platform
Solve Intelligence is a browser-based patent platform. It turns invention disclosures into applications, including genus compounds, Markush claims and ST.26 sequence listings, and generates formal drawings. It also covers office action analysis and responses, prior art search, and invalidity, FTO and infringement charts. Customers choose whether data is processed in the US or the EU. It states SOC 2 Type II and ISO 27001 certification and raised a $40M Series B in December 2025.
Strengths
- US or EU processing, chosen by the customer, with SOC 2 Type II and ISO 27001
- Invalidity, FTO and infringement charts alongside drafting and prosecution
- Chemical and Markush claims, sequence listings and formal drawings
Limits
- No published pricing; you go through a demo
- No DPMA or Indian format named
3. DeepIP
Best for: Teams that want to keep drafting inside Microsoft Word
DeepIP works inside Microsoft Word. It drafts from imported drawings, notes or disclosures, adapts to USPTO, EPO and PCT requirements, turns sketches into line art, and drafts office action responses with case-law citations. It also lists prior art, patentability, FTO and invalidity work. Its security page lists SOC 2 Type II, ISO 27001 and ISO 42001, and it raised a $25M Series B in March 2026.
Strengths
- Works in Word, so a firm's templates and review habits stay the same
- Office action responses with case-law citations
- Broad certification list, including ISO 42001 and § 203 StGB for German firms
Limits
- No published pricing; the free trial starts with a request form
- No EU data residency option stated
- Drawings are clean-ups of your sketches plus flowcharts, not figures from scratch
4. IPRally
Best for: Teams already using IPRally search who want drafting in the same app, in several European languages
IPRally is a Finnish AI patent search company that added drafting to its app in October 2026. You choose a Global, EPO or USPTO drafting style and one of eight drafting languages. It then plans and drafts the claims and description, generates figures from the text, and exports to Word or PDF. It runs on dedicated EU and US Google Cloud environments and states ISO 27001 and SOC 2 Type II. Office action work is still a prototype.
Strengths
- EU or US hosting, ISO 27001 and SOC 2 Type II
- EPO and USPTO drafting styles, and drafting in German, French, Italian, Spanish, Swedish and Finnish
- Drafting sits next to IPRally's established prior art search
Limits
- Drafting launched in October 2026, so it is new
- Annual per-seat pricing, quoted on request
- No office action responses yet
5. Patlytics
Best for: Litigation-side work: infringement and invalidity charts and portfolio analysis
Patlytics is an AI patent platform that leans toward analytics and litigation: evidence-of-use and infringement charts, invalidity and prior art search, and portfolio work. Its drafting module turns invention disclosures into complete draft applications, and it also drafts office action amendments and arguments. It states SOC 2 Type 2, ISO 27001 and ISO 42001 and raised a $40M Series B in April 2026.
Strengths
- Strong on litigation-side work: infringement and invalidity charts
- Drafting, prosecution and analytics on one platform
- SOC 2 Type 2, ISO 27001 and ISO 42001
Limits
- Pricing on request, sold through demos
- No drawing generation and no named office formats
- No hosting region or data residency option published
6. XLScout Drafting LLM
Best for: Teams drafting Japanese or US applications who already use XLScout's prior art tools
XLScout's Drafting LLM takes claims or an invention disclosure and generates claims, abstract, background and detailed description in a web editor, with flowcharts and block diagrams. It drafts in US and JP formats, with more promised, and connects to XLScout's Novelty Checker for prior art. Customers can choose US or EU servers, and XLScout states SOC 2 Type II.
Strengths
- Drafting connected to XLScout's own novelty and prior art search
- US or EU data storage
- Covers utility and design patents
Limits
- US and JP drafting formats only; no EP format
- Figures are limited to flowcharts and block diagrams
- No published pricing
7. PatentPal
Best for: Practitioners who write the claims themselves and want the rest of the specification and simple figures generated
PatentPal automates the mechanical writing in a patent application. You input your claims and it generates flowcharts for methods, block diagrams for systems, descriptions of those figures, and an abstract and summary that support the claims. Drafts export to Word, and figures to Visio or PowerPoint.
Strengths
- Focused and simple: claims in, specification text and figures out
- Figure output you can edit in Visio or PowerPoint
- Self-serve free trial
Limits
- Starts from finished claims; it does not draft claims from a disclosure
- No pricing, office formats or GDPR material on its own website
9. ClaimMaster
Best for: Proofreading, claim checks and USPTO forms inside Microsoft Word
ClaimMaster is a long-running Microsoft Word add-in for patent proofreading, claim automation, office action shells and USPTO forms. Its drafting tools turn claims into other claim types, a summary, an abstract, flowcharts and figure text. They can also send sections such as the background to an LLM you choose, including local models. Everything except the LLM calls runs offline.
Strengths
- Published per-user pricing and a 30-day free trial
- Runs locally, and you pick the LLM endpoint, which suits strict confidentiality rules
- Mature proofreading and claim-checking tools
Limits
- An assistant for drafting in Word rather than a full first-draft generator
- Built around USPTO practice
10. Patent Bots
Best for: US practitioners who want proofreading and an AI drafting assistant in Word
Patent Bots started as patent proofreading software and now covers preparation and prosecution in Microsoft Word. Its AI assistant, Sprocket, drafts claims, suggests figures and recommends language, and rule-based tools generate the abstract and brief description of the figures. It is US-focused and states that all servers are in the United States.
Strengths
- Published individual pricing and a two-week free trial
- Proofreading, office action tools and drafting help in one Word add-in
Limits
- Assistant-style drafting, not a full first-draft generator
- US servers only, and built around USPTO practice
11. Qthena (Questel)
Best for: Teams already working with Questel
Qthena is an AI drafting and prosecution assistant built by the Swiss company ipQuants and backed by Questel. It produces first drafts from a claim tree or a fuller invention disclosure, reads sketches and drawings as input, generates patent drawings on its higher plans, and drafts office action responses. UK firm HGF has expanded its use across drafting, office actions, oppositions and appeals.
Strengths
- Backed by Questel, a large Paris-based IP services company
- Reads sketches and drawings as drafting input, and generates drawings
Limits
- No published prices
- No free trial listed
12. Rowan Patents (Clarivate)
Best for: Firms that want a structured drafting environment that keeps claims, specification and figures in sync
Rowan Patents is a desktop drafting environment in which specification text, claims, figures, chemical structures and sequences stay linked and renumber automatically. AI assistants generate sections such as the summary and abstract, flowcharts and claim transformations, using local or cloud models. It has templates for US and European requirements. Clarivate acquired its developer, Rowan TELS, in July 2024.
Strengths
- Linked claims, specification and figures, with automatic renumbering
- US and European templates, with local AI models as an option
Limits
- Replaces Word as the drafting environment, which is a bigger change for a firm
- No published pricing or trial
How to choose an AI patent drafting tool
- Start with the offices you file at. US applications follow USPTO rules, such as an abstract of preferably no more than 150 words (37 CFR 1.72(b)). European claims use the two-part form of Rule 43(1) EPC wherever appropriate. A DPMA application filed in English needs a German translation within twelve months of filing, and at most 15 months from any priority date (§ 35a(2) PatG). Indian filings need IP India provisional or complete specifications. Ask each vendor for a sample draft for your office.
- Check where the data goes. Client inventions are confidential. Ask where the AI runs, where documents are stored, which sub-processors are used, and whether a DPA under Article 28 GDPR is available. PatentAssist runs every AI request in the EU and covers every account with a GDPR DPA; some tools here process data in the US.
- Decide where you want to draft. If your firm lives in Microsoft Word, a Word add-in (DeepIP, ClaimMaster, Patent Bots) changes the least. A web app gives you a dedicated editor and exports .docx.
- Check what the draft starts from. Some tools start from your invention disclosure and write the claims; others, such as PatentPal, need finished claims.
- Check whether drafting is search-informed. PatentAssist, IPRally and XLScout connect drafting to their own patent search, so you can shape the claims around the prior art while you draft.
- Look past the first draft. The draft is only the start. Check that the tool also gives you drawings, figure descriptions and a copilot for edits, so the whole application leaves one workspace. PatentAssist covers all of these, and responds to IP India FERs (Beta) with USPTO support in development.
- Know the price before the demo. Most tools here are sold through demos. PatentAssist publishes its prices and lets you start a 7-day trial at once, which is the quickest way to judge the output.
- Test with a real disclosure. Run one past invention through PatentAssist's free trial and compare the claims with what you filed.
Before you draft, check the prior art with a free patent search across USPTO, EPO and IP India. For side-by-side detail, see the PatentAssist comparisons; if you already use one of these tools, the alternatives guides set out who each suits and what to look at instead. Wondering whether a general assistant is enough? Read PatentAssist vs ChatGPT. Searching before you draft? Compare the best patent search software.
Sources for the rules above: MPEP 608.01(b) (37 CFR 1.72(b)), Rule 43 EPC, § 35a PatG.
AI patent drafting tools: frequently asked questions
What is the best AI patent drafting tool?
For US and European patent work we recommend PatentAssist. It drafts claims, specification, abstract and drawings from an invention disclosure in USPTO, EPO, DPMA or IP India format. AI patent search sits in the same workspace, prices are public and there is a 7-day free trial.
Which AI patent drafting tools draft for the EPO?
PatentAssist drafts to EPO format, including Rule 43(1) two-part claims, and to DPMA format in German. Solve Intelligence, IPRally, IP Author and DeepIP also name EPO drafting or EPO requirements, and Rowan Patents has European drafting templates. XLScout drafts in US and JP formats, and ClaimMaster and Patent Bots are built around USPTO practice.
Which tools draft German applications for the DPMA?
PatentAssist drafts DPMA applications to the European structure and delivers them in German with German headings, without the paragraph numbering the DPMA advises against. IPRally drafts in German among eight languages, in Global, EPO or USPTO style. DeepIP lists the DPMA among offices whose formal requirements it addresses.
Which AI patent drafting tools support Indian filings?
PatentAssist drafts Indian provisional and complete specifications in IP India format and exports them with the Form 2 first page. DeepIP lists the Indian Patent Office among offices whose formal requirements it addresses; the other tools here publish US, European, PCT or JP formats only.
Which tools process data in the EU?
PatentAssist runs every AI request on Azure OpenAI in the EU, covers every account with a GDPR Article 28 DPA and publishes its sub-processor list. Its app and files are hosted in Azure Central India. Solve Intelligence and IPRally offer EU processing, XLScout offers EU servers, and IP Author stores EU customers' data in EU AWS regions. Patent Bots states that all its servers are in the United States, and Patlytics does not name a hosting region.
Is there a free AI patent drafting tool?
No tool here is free for ongoing use, but PatentAssist has a self-serve 7-day free trial with 300 credits and every feature. ClaimMaster, IP Author, Patent Bots and PatentPal also have self-serve trials; DeepIP, XLScout and IPRally arrange trials on request, and Solve Intelligence, Patlytics, Qthena and Rowan Patents are sold through demos.
Which tools publish their prices?
PatentAssist publishes its prices, with every feature on every plan. ClaimMaster, IP Author and Patent Bots also publish prices. Solve Intelligence, DeepIP, IPRally, XLScout, Patlytics, Qthena and Rowan Patents are priced on request, and PatentPal does not show prices on its website.
Will an AI drafting tool replace my patent attorney?
No. These tools draft faster, but the judgement on claim scope, prior art and prosecution strategy stays with the patent attorney or agent who signs the filing. They are most useful for getting a reviewable first draft quickly.