The 10 Best AI Tools for Brand Voice Guides in 2027
By Kory White · Updated Oct 2026 · 5 min read
Direct answer
Writer is the best AI tool for brand voice guides: its Voice and style guide feature is headlined "Brand standards, enforced everywhere." Jasper Brand Voice ($59 per seat per month billed yearly) is #2 and Markup AI, which was Acrolinx ($249/month with annual discount), is #3.
Frontify's Brand Assistant answers brand questions in plain language, and says the answers are based on your guidelines, not what an AI thinks your brand might do
Brand teams that keep their guidelines in Frontify and want answers drawn from them
Do-it-yourself voice guides: paste your guide and samples into a project
Pick by what you want
Best overall
Writer Voice and Style Guide
Best dedicated voice builder
Jasper Brand Voice
Best for checking drafts
Markup AI Review for Brand
Best lowest price
Grammarly Brand Tones
Best for HubSpot users
HubSpot Breeze Brand Voice
Best DIY route
Claude Projects
The ranking
1
Writer Voice and Style Guide
Answrs VerdictThe most complete voice, terms and style-guide system here.
Headline feature: Writer headlines its Voice and style guide feature as "Brand standards, enforced everywhere."Voices: Users can pick a voice for each use case, with examples for product messaging, CEO thought leadership and SDR outreachBrand assets: Voice, Terms and Style Guide are listed as features that encode a company's standards for its AI agentsPlans: Starter includes up to 5 users and 1 team Personality profile; Enterprise includes departmental brand and voice profilesPrice: Starter has a 14-day free trial with no credit card required; Enterprise is Contact sales and no dollar prices are listed
Writer headlines its Voice and style guide as "Brand standards, enforced everywhere." Users pick a voice per use case, such as product messaging, CEO thought leadership or SDR outreach, and Voice, Terms and Style Guide encode a company's standards for its AI agents. Starter allows up to 5 users and 1 team Personality profile; Enterprise adds departmental brand and voice profiles. No dollar prices are listed.
Go ifEnterprises that want brand voice, terms and a style guide enforced across AI agents
Skip ifYou want a published monthly price for a single writer
Why #1 over #2: Its Enterprise plan offers departmental voice profiles, where Jasper Pro includes 2 voices.
2
Jasper Brand Voice
Answrs VerdictA dedicated Brand Voice feature with clear per-seat pricing.
Headline feature: Jasper says: Let AI analyze your content's tone of voice, then set tone and formatting rules so Jasper's writing always sounds like youPro voices: The Pro plan includes 2 Brand VoicesBusiness voices: The Business plan includes unlimited voicesPrice: Pro is $69 per seat per month billed monthly or $59 per seat per month billed yearly; Business is custom pricing
Jasper says its Brand Voice lets AI analyze your content's tone of voice, then set tone and formatting rules. Pro includes 2 Brand Voices at $69 per seat per month billed monthly or $59 billed yearly; Business has unlimited voices at custom pricing.
Go ifMarketing teams that want to build brand voices from their own content
Skip ifYou need more than 2 voices without a custom contract
Why #2 over #3: It publishes a clear $59 yearly seat price, which Writer does not.
3
Markup AI Review for Brand
Answrs VerdictAcrolinx, renamed Markup AI, is the content-governance pick.
Rename: The Acrolinx site states "Acrolinx is now Markup AI."Headline feature: Markup AI checks content against your brand style guide, voice guidelines and AI search readiness, and flagged issues get rewritten automaticallyIntegrations: Starter lists Google Docs, MS Word, API, ChatGPT, Claude and MCPStarter: $249/month with annual discount, unlimited users and 12 million words checked a yearBusiness: $999/month with annual discount and 50 million words checked a year; Enterprise is by conversation
Markup AI is the new name for Acrolinx. It checks content against your brand style guide, voice guidelines and AI search readiness, and flagged issues get rewritten automatically. Starter is $249/month with annual discount with unlimited users and 12 million words checked a year; Business is $999/month with 50 million words.
Go ifTeams that want every draft scored against a brand style guide before it publishes
Skip ifYou want a generator rather than a checker
Why #3 over #4: It scores drafts from any source, while Grammarly's Pro tier stops at 1 brand tone.
4
Grammarly Brand Tones
Answrs VerdictBrand tones inside the writing assistant people already use.
Headline feature: The plans page lists Style guide and Brand tones as team featuresPro: Pro includes 1 style guide and 1 brand toneEnterprise: Enterprise includes unlimited style guides and unlimited brand tones, available through Superhuman GoFree plan: Style guide and brand tones are not available on the Free planPrice: Free is $0 per month; Pro is $12 USD with no billing period stated on the page; Enterprise is by quote
Grammarly's plans page lists Style guide and Brand tones as team features: Pro includes 1 of each and Enterprise includes unlimited of each, available through Superhuman Go. They are not available on the Free plan. Pro is $12 USD, with no billing period stated on the page.
Go ifTeams that already write in Grammarly and want tone and style rules applied there
Skip ifYou need many brand tones below the Enterprise tier
Why #4 over #5: Its $12 Pro price is far below Anyword Starter at $39 on yearly billing.
5
Anyword Brand Voice
Answrs VerdictBrand voice paired with performance prediction.
Brand voices: Starter and Data-Driven include 1 brand voice, Business 5; Enterprise is customBrand rules: 25 brand rules on Starter and Data-Driven, 125 on Business, unlimited on EnterpriseTrial: The free trial is 7 days with a limit of 2,500 wordsPrice: Starter $49 per month or $39 per month billed yearly; Data-Driven $99 per month or $79 per month billed yearly
Anyword includes 1 brand voice on Starter and Data-Driven and 5 on Business, with 25 brand rules on the first two and 125 on Business. Starter is $49 per month or $39 per month billed yearly, and Data-Driven is $99 or $79 yearly. The free trial is 7 days with a 2,500-word limit.
Go ifMarketers who want brand rules plus performance prediction in one tool
Skip ifYou need more than 1 voice on an entry plan
Why #5 over #6: It offers 25 brand rules on Starter, where HubSpot publishes no rule limit.
6
HubSpot Breeze Brand Voice
Answrs VerdictBuilt into HubSpot content tools, if you already pay for Professional.
Setup: HubSpot generates a baseline brand voice from its content intelligence and your website content, or from a writing sample of at least 500 wordsTuning: Choose up to four personality and tone characteristics, then add your company mission, terms to avoid and inclusivity settingsWhere it applies: The Apply brand identity option in the AI assistant applies the voice to blogs, pages, marketing emails, social posts and SMS messagesLanguages: English, Spanish, Portuguese, French, German and JapanesePrice: Not published on the article; it requires a Professional or Enterprise subscription
HubSpot generates a baseline brand voice from its content intelligence and your website, or from a writing sample of at least 500 words, and lets you choose up to four tone characteristics. The Apply brand identity option applies it to blogs, pages, marketing emails, social posts and SMS. It supports six languages and needs a Professional or Enterprise subscription.
Go ifHubSpot customers who want one voice applied across blogs, emails and social
Skip ifYou are not on a Professional or Enterprise HubSpot plan
Why #6 over #7: It applies one voice across blogs, emails and social inside the CRM, which Copy.ai does not state.
7
Copy.ai Brand Voice
Answrs VerdictSample-based brand voice, but its plan wording is out of date.
Headline feature: Copy.ai describes Brand Voice as a feature that allows you to inject your brand's distinctive tone, style and more into generated contentSetup: You input examples of your existing content and Copy.ai recommends at least 300 wordsVoices: You can create unlimited Brand Voices with a Pro account, per the Brand Voice pageSecurity: Copy.ai cites its SOC 2 Type II certificationPrice: The current prices page lists Chat at $29 per month or $24 per month billed annually, and does not mention brand voice in any tier
Copy.ai describes Brand Voice as a way to inject your brand's tone and style into generated content from examples of at least 300 words, with unlimited Brand Voices on a Pro account per that page. Its current prices page lists Chat at $29 per month or $24 billed annually and does not mention brand voice, so check the plan before buying.
Go ifSmall teams that want to teach a model their voice from samples
Skip ifYou need the current plan that includes Brand Voice confirmed in writing
Why #7 over #8: It takes samples as short as 300 words, against HubSpot's 500.
8
Typeface Arc Graph
Answrs VerdictBrand guidelines turned into data its agents enforce.
Headline feature: Typeface says brand guidelines, audiences, assets and campaign learnings are held as structured intelligence agents can act on and enforceVoice: Typeface says it keeps every asset true to the right identity, voice and guidelinesAgents: Agents plan, execute, check their own work and iterate until it clears your barPrice: Not published; the page offers Get a demo
Typeface says brand guidelines, audiences, assets and campaign learnings are held as structured intelligence agents can enforce, and that every asset stays true to the right identity, voice and guidelines. No price is published; the page offers a demo.
Go ifLarge marketing teams that want agents to follow brand guidelines
Skip ifYou want a self-serve plan with a price
Why #8 over #9: It is built to make agents follow guidelines, where Frontify's assistant answers questions about them.
9
Frontify Brand Assistant
Answrs VerdictA guideline home with an assistant that answers from it.
Headline feature: Frontify's Brand Assistant answers brand questions in plain language, and says the answers are based on your guidelines, not what an AI thinks your brand might doOther AI: Automated content generation, creative automation and AI translation of guideline pages, with human review recommended before external sharingIntegrations: An MCP server and a Microsoft Copilot integrationPrice: No fixed prices; Frontify proposes a tailored package based on monthly active users
Frontify's Brand Assistant answers brand questions in plain language from your guidelines. It also lists automated content generation, creative automation and AI translation of guideline pages, with an MCP server and a Microsoft Copilot integration. Pricing is a tailored package based on monthly active users.
Go ifBrand teams that keep their guidelines in Frontify and want answers drawn from them
Skip ifYou want a tool that scores or rewrites copy against a voice
Why #9 over #10: It keeps the guidelines themselves in one place, which Claude Projects leaves to you.
10
Claude Projects
Answrs VerdictThe flexible DIY route to a voice guide.
Projects: Projects are self-contained workspaces with their own chat histories and knowledge basesInstructions: Each project can have its own instructions to shape responses, such as using a more formal toneKnowledge: You can upload documents, text, code and other files to a project's knowledge basePlans: Free users can create up to 5 projects; sharing is on Team and Enterprise onlyPrice: Free is $0; Pro is $17 per month with annual billing or $20 billed monthly; Team standard seats are $20 per seat billed annually
Claude Projects are workspaces with their own chat histories, a knowledge base of uploaded files and custom instructions, so you can paste a voice guide and samples. Free users can create up to 5 projects, Pro is $17 per month with annual billing, and sharing is on Team and Enterprise only.
Go ifDo-it-yourself voice guides: paste your guide and samples into a project
Skip ifYou need a checker that scores every draft against the guide
How we ranked these
We ranked tools on how directly each vendor says it captures, enforces or generates in a brand voice, how many voices or rules its plans include, and whether a price is published. Acrolinx is now Markup AI, and Grammarly Business is now covered by Grammarly's Pro and Enterprise plans. We dropped ChatGPT Custom GPTs because OpenAI's pages could not be read for verification. Typeface, Copy.ai and Frontify are listed with the limits of what their pages state. Facts are taken from each maker's own published information; check the official site before you buy.
Questions people ask
What is the best AI tool for brand voice guides?
Writer is our top pick: its Voice and style guide feature is headlined "Brand standards, enforced everywhere." Jasper Brand Voice is #2 and Markup AI is #3.
Is Acrolinx still available?
Acrolinx is now Markup AI, per the Acrolinx site. Markup AI Starter is $249/month with annual discount.
Which tool has the cheapest published brand tones plan?
Grammarly Pro is $12 USD and includes 1 brand tone and 1 style guide; the page does not state its billing period.
How many brand voices does Jasper include?
The Pro plan includes 2 Brand Voices at $69 per seat per month billed monthly or $59 billed yearly; Business includes unlimited voices.
Lowest monthly price published for a plan with brand voice or tone features, in USD (billing basis differs: Grammarly not stated, Jasper, Anyword, Copy.ai Chat and Claude yearly, Markup annual discount) at a glance
Grammarly Brand Tones12 USD
Claude Projects17 USD
Copy.ai Brand Voice24 USD
Anyword Brand Voice39 USD
Jasper Brand Voice59 USD
Markup AI Review for Brand249 USD
Lowest monthly price published for a plan with brand voice or tone features, in USD (billing basis differs: Grammarly not stated, Jasper, Anyword, Copy.ai Chat and Claude yearly, Markup annual discount), as published by each maker. Picks without a published figure are left off.
