Writable

What Writable does

Writable is a K-12 writing instruction and assessment platform serving grades 3-12 across U.S. schools and districts. The product combines scaffolded, customizable assignments (1,000+ with 300+ reading options), formative assessment tools, and an AI feature suite - GrammarAid, RevisionAid, GradeAssist, AI Suggested Comments, AI Prompt Suggestions, and Authorship Alerts (AI-detection) - that automate rubric-aligned feedback, draft scoring, and grammar/revision guidance. Core technology is built on OpenAI's GPT models and integrates via two-way sync with Google Classroom, Canvas, Schoology, Microsoft Teams, and HMH Ed, alongside a Turnitin Originality Check integration for plagiarism detection. The platform supports text, audio, and video student responses and is FERPA-, COPPA-, and Student Privacy-certified with WCAG 2.0 AA accessibility.

Writable was founded around 2016-2017 by a team that previously built ELA tools including Subtext and Accelerated Reader, and was acquired by Houghton Mifflin Harcourt (HMH) in February 2024. Post-acquisition, the company operates as the team behind HMH Labs, HMH's emerging-technology incubator focused on generative AI, while continuing to sell and support Writable as a standalone product alongside HMH curriculum lines such as Into Literature and Into Reading. Reach is claimed at 16,000+ schools and districts.

The business model is hybrid PLG-plus-enterprise-sales: teacher accounts are permanently free with a 30-day trial once students engage, driving bottom-up adoption; school and district licenses are sold at roughly $9 per student all-inclusive (alternatively $1/student/month with volume discounts), billed annually via purchase order, check, direct deposit, or credit card, with quotes generated through HMH Cost Proposals. Distribution is multi-channel: direct district field sales, self-serve teacher sign-up, deep LMS marketplace integrations, and event presence at ISTE. No revenue is publicly disclosed, and the company is private and consolidated into HMH.

Name

Writable

Legal name

Writable, Inc.

Website

https://writable.com

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

1–10 employees

Short description

Writable is a K-12 writing instruction and assessment platform for grades 3-12, offering scaffolded assignments, AI-powered feedback, and LMS integrations; it was acquired by Houghton Mifflin Harcourt in February 2024 and now serves 16,000+ U.S. schools and districts as part of HMH Labs.

Ownership category

akta.pro rank

Product category

K-12 Education Software

NAICS

All Other Schools and Instruction (61169), Exam Preparation and Tutoring (611691)

SIC

Services-Prepackaged Software (7372), Services-Educational Services (8200), Services-Computer Programming Services (7371)

akta.pro primary industry

Literacy Foundations (Phonics, Reading Fluency, Comprehension) Platforms (EDAFAOAD)

akta.pro secondary industry

K–12 Remedial Writing & Composition Support (EDANAJAC)

Keywords

• Writing instruction platform
• K-12 education software
• AI feedback tools
• Formative assessment tools
• LMS integration

Headquarters

HQ city

Palo Alto

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Marketing or Sales, Operations

Revenue model

1. Per-Student District/School Subscription: Schools and districts purchase access on a per-student basis. Pricing starts at $9 per student (all-inclusive). The platform is a paid/premium service with limited free trial period. Districts can purchase via purchase order, check, direct deposit, or credit card.
2. Free Teacher Accounts: Individual teacher accounts are free, providing a bottom-up adoption motion. Teacher recommendations can set classes to 'self-pay' where parents cover costs, or districts cover site licenses.

Pricing tiers

Go-to-market motion4 records

Distribution channels7 records

Marketing channels8 records

Core offering

Writable is an AI-powered K-12 writing instruction platform that combines 1,000+ customizable assignments, real-time AI feedback tools (GrammarAid, RevisionAid, GradeAssist, Authorship Alerts), and formative assessment for grades 3-12. The platform includes guided writing workflows with peer review, multimedia response options, and two-way LMS integration with Google Classroom, Canvas, Schoology, Microsoft Teams, and HMH Ed. Schools and districts subscribe on a per-student basis, with free teacher accounts enabling bottom-up adoption.

Product overview

Writable is a unified K-12 writing instruction platform acquired by Houghton Mifflin Harcourt (HMH) in February 2024, now operating as part of HMH Labs. The core Writable platform provides an all-in-one solution combining Responsive Assignments (1,000+ customizable assignments with 300+ reading options), AI for Impact (AI-powered feedback tools including GrammarAid, RevisionAid, GradeAssist, and Authorship Alerts), and Student Experience (guided writing with peer review and multimedia responses). The platform is complemented by Writable Academy for professional learning and AI on Any Document for feedback on external documents. The platform integrates with major LMS systems (Google Classroom, Canvas, Schoology, Microsoft Teams, HMH Ed) and Turnitin for originality checking.

Differentiator

Problem solved

Functional benefit

Products and services

• Writable (Core Platform) An all-in-one K-12 writing instruction platform that scaffolds student learning and builds lifelong writing and reading skills for grades 3-12, while saving teachers time on daily instruction and feedback. Includes 1,000+ customizable assignments, 300+ reading options, AI-powered feedback tools, LMS sync, differentiation supports, reporting dashboards, and professional learning resources. Sold on a per-student subscription basis to schools and districts.
• Writable Academy Professional learning platform offering mini courses, events, and certifications taught by celebrated authors and thought leaders, allowing educators to earn badges and certificates in 20 minutes or less. Complements the core Writable platform with educator development resources.

Quantifiable outcome

• 60% increase in assessment scores achieved by Warren County Public Schools (Kentucky) in 2022
• +3 more outcomes

Named customers13 records

Segments4 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

AI capability9 records

Feature9 records

Partnerships

Seven partnerships are on record, tiered core.

• Houghton Mifflin Harcourt (HMH)coreStrategic or Co-development Partner · 28 February 2024Writable was acquired by Houghton Mifflin Harcourt in February 2024 and now operates as part of HMH Labs, an emerging technology incubator focused on generative AI. Writable provides the team behind new AI initiatives while maintaining its standalone product offering alongside HMH curriculum products like Into Literature and Into Reading.
• OpenAIcoreTechnology or IntegrationOpenAI's technology powers Writable's AI features including prompt suggestions and AI-generated content. The partnership enables Writable to provide AI-powered writing assistance to educators and students.
• TurnitincoreTechnology or IntegrationTurnitin's Originality Check is integrated into Writable's platform to help teachers protect authentic learning by evaluating originality and helping students learn to cite sources accurately.
• Google ClassroomcoreTechnology or IntegrationWritable integrates with Google Classroom for two-way sync of rosters, assignments, and grades, allowing students to access assignments from their existing Google Classroom environment.
• Canvas (by Instructure)coreTechnology or IntegrationWritable provides full integration with Canvas LMS including roster synchronization and grade book sync, enabling seamless assignment and assessment workflows.
• SchoologycoreTechnology or IntegrationWritable integrates with Schoology learning management system for roster and assignment synchronization, supporting districts using this LMS platform.
• HMH EdcoreTechnology or IntegrationWritable syncs with HMH Ed platform as part of the Houghton Mifflin Harcourt ecosystem, allowing districts using HMH curriculum to access Writable features seamlessly.

Scale indicators8 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Turnitin: Academic-integrity and writing-feedback platform with originality checking and AI writing detection. Writable integrates Turnitin today, but Turnitin's Draft Coach and AI insights overlap with Writable's Authorship Alerts and feedback suite, making it both a partner and adjacent competitor.
• CommonLit: Nonprofit K-12 literacy platform offering reading passages, writing prompts, and assessments free to teachers. Competes with Writable on reading-comprehension-tied writing assignments and district ELA adoption.
• NoRedInk: Direct competitor in K-12 writing instruction with personalized grammar/writing practice and feedback. Targets the same grades 3-12 ELA teachers and districts as Writable with a similar per-seat subscription model.
• Grammarly for Education: Consumer/professional writing assistant extended into K-12 and higher ed with AI feedback on grammar, mechanics, and style. Directly overlaps with Writable's GrammarAid and revision support use cases for students and teachers.
• Quill (Quill.org): Nonprofit providing free, standards-aligned K-12 writing and grammar instruction. Competes head-to-head with Writable on writing-practice assignments, formative feedback, and ELA teacher adoption in resource-constrained districts.

Emerging players

• Khanmigo (Khan Academy): Khan Academy's AI tutor offering personalized learning across subjects including writing. Co-listed with Writable in the Louisiana state AI platform authorization, competing for the same state-level K-12 AI budgets.
• Amira Learning: AI-driven literacy tutor focused on K-3 reading fluency with rapid expansion into upper grades. Co-listed with Writable in Louisiana's $1M AI platform authorization; competes for early-grades ELA/writing intervention budgets.

Broad incumbents

• Newsela: K-12 instructional content platform with leveled reading passages and writing prompts used in ELA classrooms. Overlaps with Writable's reading-tied writing assignments and competes for district ELA content budgets.
• Amplify: Major K-12 curriculum and assessment publisher (owned by Emerson Collective) offering ELA programs that compete with HMH's Into Reading/Into Literature. Represents both a competitor to HMH's core franchise and a potential alternative for districts evaluating Writable.
• Lexia (Cambium Learning): Established K-5 literacy instruction platform owned by Cambium Learning Group. Competes with Writable on literacy assessment and intervention, particularly at the elementary end of Writable's grade-3-12 range.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/getwritable
• Facebookfacebook.com/groups/572972806575055
• LinkedInlinkedin.com/company/writable

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds1 record

Investors2 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Writable