Flint
Flint is an AI learning platform built for K-12 schools. Teachers generate AI activities, students work through them with the Sparky tutor, and the platform returns cited feedback, live class analytics and full administrator oversight.
What is Flint?
Flint is an AI-powered personalised learning platform for K-12 schools, published by Flint, Inc. in New York. Its branded assistant, Sparky, plays two roles: a tutor on the student side, a teaching assistant on the teacher side. A teacher describes an activity in plain language, Sparky turns it into an interactive activity, students work through it in conversation with the AI, and the AI returns written feedback with clickable in-line citations pointing to the exact extract used, whether that is the teacher's uploaded content or a web source.
On the model layer the site is not consistent with itself: the FAQ states that Flint currently uses Claude 4.5 Sonnet with custom-built tooling around it, while the homepage and the teachers page still mention Claude 4 Sonnet. Around that core, Flint adds DALL-E 3 for image generation, Google Translate for translation and Google speech synthesis, plus integrated web search, so there is no effective knowledge cut-off date. Maths is computed by code running in the background rather than written out as text, with 2D and 3D equation plotting, a LaTeX and MathType-style formula editor, a built-in code editor with syntax highlighting for 50+ languages, a whiteboard for showing working, image processing and handwritten note transcription. Dedicated pages cover maths, English, social studies, science, computer science and world languages.
Supervision is the other half of the product. By default the AI will not give the answer or do the work in the student's place, and teachers can loosen that. Inappropriate messages, covering violence, harassment, threats, self-harm and sexual content, are flagged automatically for administrator review, and administrators can see every message exchanged across the school.
Audience claims are worth weighing carefully. The homepage cites 650,000+ teachers and students, with testimonials from schools in the United States, Brazil, Japan, China, Spain, Indonesia, Uzbekistan, Malaysia and Canada. Language coverage is stated differently depending on the page: 50+ languages and 200+ dialects in the marketing copy, 800+ languages and dialects in the help centre. New features ship roughly every two to three weeks.
What it does
- Create an interactive AI activity from a plain-language description of what students should do
- Upload PDF, Word, PowerPoint or CSV files and web links to ground the AI's answers in your own material
- Differentiate a single assignment into several versions and reading levels
- Give written feedback on an essay draft against an uploaded rubric, whether AP, IB or your own
- Track class engagement, understanding and projected grades live while students work
- Generate a targeted follow-up activity from the weaknesses the AI has detected
- Import classes and rosters from your LMS or SIS through Edlink
When to use Flint / When not to
A quick filter to help you decide if Flint is the right fit.
When to use Flint
- K-12 teachers who want to differentiate instruction across reading levels and ability groups without doubling their prep time
- Schools and districts looking for a supervised way to bring AI into class, with administrator visibility over every student-AI message
- Students who need a tutor outside class hours for revision, essay writing or maths, and who are meant to be guided rather than handed the answer
- Schools working with under-13 pupils or with learners who have special educational needs, two groups most consumer AI tools exclude; Flint reports partnerships with several learning-difference schools
- World language departments and faith-based schools: activities can be set to ACTFL or CEFR levels with a primary and a secondary language, and tuned through a Mission and Background setting
When not to use Flint
- Developers who want to build on top of the tool: there is no public API and no developer documentation anywhere on the site
- Anyone who needs a native mobile app; Flint is browser-only, with no App Store or Google Play listing
- Higher education institutions and corporate training teams, since the positioning is exclusively K-12
- Schools that need grade passback or assignment management from their LMS or SIS: the integrations cover rostering only, the rest is announced as roadmap
- Individual learners looking for an AI that will simply produce the answer or write the work for them; the default guardrails refuse both, and the product is deployed school by school rather than sold to individuals
How to use Flint
A typical end-to-end flow, from setup to results.
- Sign up at app.flintk12.com/sign-in, in one click with Google or Microsoft SSO, or by creating an account manually
- Have the school whitelist its email domains, so that any user on those domains can register
- Optionally, let administrators import classes from Veracross, Blackbaud, Canvas and other systems through Edlink
- As a teacher, describe the activity in plain language, for example a persuasive writing activity for 9th grade, and let Sparky build it
- Set the activity parameters: primary and secondary language, ACTFL or CEFR level, rubric, guardrails, time limit and due date
- Run the automated preview, in which the AI simulates a student interaction before you publish
- Alternatively, start from the public library of activities shared by other teachers, then duplicate and adapt one
- Students open the activity and talk with Sparky, sending screenshots, drawings, PDFs and links as needed
- On submission, each student receives a summary of strengths and areas to improve, linked to the relevant passages, plus an AI grade the teacher can disable or override
- Back on the teacher side, read the class summary and live analytics, then generate follow-up activities from what they show
Pros & Cons
Pros
- Free for up to 80 users with no time limit, which makes a genuine pilot possible before any purchase
- Open to under-13 students, unlike most consumer AI tools, with ACTFL and CEFR levelling and 800+ languages and dialects according to the help centre
- Flint states it never uses user data to train or fine-tune models
- Pedagogical traceability: in-line citations point back to the exact source extract, and the default guardrails favour learning over an instant answer
- Full oversight: every student-AI message is visible to the teacher and the administration, and sensitive content is flagged automatically
- Rostering integrations with almost every LMS and SIS on the market through Edlink
- Transparency and support: a detailed sub-processor list with 11 entries giving location and contact for each, state DPAs already signed in seven US states, unlimited professional development with paid licences, free and public PD material, and live chat support from 9am to 9pm Eastern time
Cons
- No public API and no developer documentation
- No native mobile app: the product is browser-only
- Public pricing is published by user band only and stops at 500 users; beyond that, pricing is on quotation
- LMS and SIS integrations handle rostering only, with no grade passback and no assignment management
- The terms state that Flint does not control the model-training practices of its AI providers and cannot guarantee they refrain from using Input or Output
- No published security certification: neither SOC 2 nor ISO 27001 is mentioned anywhere on the site
- Data is hosted in the United States, so European schools face a transfer outside the EU, and COPPA compliance depends on a parental waiver the school itself has to collect; the site also contradicts itself on support hours, with 24/7 live chat in one FAQ answer and 9am to 9pm Eastern in another, and on language counts, with 50+ in marketing copy against 800+ in the help centre
Pricing & Plans
Flint operates on a freemium model. A free plan is available permanently for up to 80 users, a user being a student, a teacher or an administrator. The lowest paid entry point is USD 3,000 per year for up to 150 users, which the vendor presents as USD 1.67 per user per month. The higher bands are USD 4,000 per year for up to 250 users (USD 1.33 per user per month) and USD 6,500 per year for up to 500 users (USD 1.08 per user per month). Above 500 users, pricing is quoted on request with degressive per-seat rates. Billing may be annual or monthly, quotations are issued by email at sales@flintk12.com, and proration is possible mid-subscription if headcount changes. Flint states that its offering is eligible for Title IV funding (20 U.S. Code paragraph 7117 a3C, a3F, a3J) and publishes a purchasing guide for public, private and international schools.
- up to 80 users
- USD 0
- with no time limit
- USD 3
- 000 per year
- presented as For small pilots
- with everything in Free plus SIS and LMS integration
- school-wide data analytics and a dedicated customer success manager
- USD 4
- 000 per year
- presented as For smaller schools
- with the same inclusions
- USD 6
- 500 per year
- presented as For midsize schools
- with the same inclusions
- Custom pricing
- presented as For large schools
- with everything in the paid plans and lower per-seat prices
Data, GDPR & hosting
A consolidated view of how Flint handles your data.
GDPR overview
GDPR compliance is claimed explicitly on the Security page and in the FAQ, with concrete mentions behind the claim. Flint states that its framework covers FERPA (US), GDPR (EU/EEA), the DSA (EU/EEA through DataRep) and state-specific US requirements. DataRep is the appointed Article 27 representative for the EU and the UK (datarequest@datarep.com, form at www.datarep.com/data-request, letters must quote Flint, Inc.). An external Article 37 DPO is designated: Engage Compliance Ltd, dpo@engagecompliance.co. Sub-processors are engaged under Article 28(3), in adequate countries or under standard contractual clauses. An EU AI Act statement describes Flint as a Product Manufacturer running regular audits of its AI components, with the offering not classified high risk. State DPAs are signed in Illinois, Massachusetts, Maine, New Hampshire, New York, Rhode Island and Vermont. Rights are exercised through a HubSpot form or support@flintk12.com. Do-Not-Track signals are not honoured. Policy and terms are both dated 3 August 2026.
Who owns the data?
Ownership sits with the school and the user, not the vendor. Schools own all personally identifiable student information, including name, ID number and photo, as well as all Student Personal Data and Student-Created Content. Users retain ownership of all AI Content, Input and Output alike, including the associated intellectual property rights. In return, Flint takes a worldwide, irrevocable, perpetual, non-exclusive and royalty-free licence over User Generated Content, purely to operate the service; no ownership transfers. Student work counts as an education record under FERPA, so parents may review and delete it while the student is under 18. Each school's data is siloed and is not accessible to the model providers.
Reuse rights
Because users keep ownership of their AI Content, they can reuse what they produce with Flint - activities, drafts, feedback and transcripts - without asking permission, and sessions can be printed or exported as PDF. On Flint's side, student data is used solely for educational purposes and never for marketing without prior consent, and the company states that it neither sells nor discloses it to third parties or commercial partners. The categories collected include names, email addresses, Google profile picture, location, business contact details, phone number, identifiers, passwords and conversation history with the chatbots; automatic technical data such as browser, operating system, pages viewed and time spent is de-identified and aggregated. A date of birth is requested at direct sign-up for age verification only and is not retained. Rostering information received from third parties through the SIS and LMS integrations is limited to first name, last name, email and courses. Flint may supply de-identified school records to its AI Functions in order to generate content or deliver the service, and uses Input and Output to provide, maintain, improve and develop those AI Functions, to comply with the law and to enforce its policies.
Data retention & training
Hosting summary
Flint states plainly that it securely stores data in the United States, and the terms confirm that the services are hosted there. The company operates no data centre of its own and relies on established cloud providers. The application and analytics stack runs on Vercel, Supabase, Mixpanel and Sentry; AI processing goes primarily to Anthropic, with marginal use of OpenAI. The sub-processor page, dated 28 July 2026, lists 11 named processors - Anthropic, ConvertAPI, Datalab.to, Edlink, Intercom, OpenAI, PostHog, Sentry, Supabase, Twilio/SendGrid and Vercel - each with its location, data categories and privacy contact. Some sit outside the US: ConvertAPI in the EU (Lithuania), Datalab.to in the EU (Netherlands), and Edlink in a region the customer selects (United States, Canada, Germany or Australia). Anthropic routing is described as still being arbitrated, between direct US processing and AWS Bedrock or Vertex AI in the EU. For transfers, EU standard contractual clauses (module 2) and the UK IDTA are in place with Anthropic.
Things to keep in mind
Risks and trade-offs to weigh before adopting Flint.
- The terms state that Flint does not control the model-training practices of its AI providers and cannot guarantee they will refrain from using Input or Output; Flint commits only to limiting such training where commercially available and contractually permitted
- COPPA compliance depends on a signed parental technology waiver that the school, not Flint, is responsible for collecting
- The terms warn against relying on the Output without independent verification, including for educational advice, and ask school staff not to rely solely or primarily on the AI for consequential decisions about a student
- Flint is granted a perpetual and irrevocable licence over User Generated Content in order to operate the service; ownership stays with the user, but the licence itself does not expire
- The AI is described as being at an early stage of development and known to produce errors, so over-trusting a tutor that sounds confident is a real classroom risk
- Data is stored in the United States, which means a European school is making a transfer outside the EU every time a pupil uses the tool
- Direct use outside a school deployment requires being 13 in the US and UK, or 16 in the EEA; and as with any always-available AI tutor, the effort of drafting, struggling and revising can quietly be offloaded to the machine even when the guardrails hold
Setup & Integrations
Technical difficulty
Low. Signing up takes one click through Google or Microsoft SSO, or a manually created account. Building an activity requires no technical skill and no prompt engineering, since you describe what you want in plain language and the prompt is formatted automatically. School-wide deployment means whitelisting email domains, then optionally importing classes through Edlink. An administrator checklist and dedicated help-centre articles cover the process. Paid licences include unlimited professional development and one-to-one onboarding calls, and Flint publishes free PD material openly, from printables and slide decks to video tutorials.
Deployment
Integrations
Supported languages
Behind Flint
Fundraising
Social
Resources
All the official URLs gathered for verification and reference.
Alternatives
Tools that compete with or complement Flint.
Frequently asked questions
Which AI model does Flint run on?
Does Flint train its AI on school data?
Can students under 13 use Flint?
How much does Flint cost?
Which LMS and SIS does Flint integrate with?
How many languages does Flint support?
Is support available 24/7?
Will the AI simply give students the answer?
What happens if a student raises an inappropriate topic?
Is Flint GDPR compliant, and can a school sign a DPA?
Should you pick Flint?
Flint takes a clear stance: AI framed by the teacher, not AI in the student's place. By default the assistant refuses to hand over answers or do the work, every exchange stays visible to teachers and administrators, and sensitive messages are flagged automatically. Combined with in-line citations that point back to the exact source extract, that posture makes the tool auditable in a way general-purpose chatbots are not.
Three things genuinely set it apart. Under-13 students are admitted, which most consumer AI tools refuse. Flint states it never uses user data to train or fine-tune models. And schools keep ownership of student data and student-created content, with each school's data siloed from the model providers. The free tier up to 80 users, with no time limit, means a school can run a real pilot with no commitment before considering a licence starting at USD 3,000 per year.
The reservations are just as concrete. Data is hosted in the United States, which means a transfer outside the EU for European schools. No security certification is published, neither SOC 2 nor ISO 27001. There is no public API and no native mobile app. The terms explicitly reserve the case of third-party AI providers whose training practices Flint does not control. And the site contradicts itself on several published figures, including the AI model in use, support hours and the number of supported languages, all worth clarifying with the vendor before signing.
The audience is unambiguous: K-12 schools and their teachers first, with students reached through their institution rather than individually. For a school that wants supervised, traceable AI rather than unmonitored consumer tools, Flint is a serious candidate. For anyone outside K-12, or anyone needing an API or a mobile app, it is the wrong fit.
- Choosing a selection results in a full page refresh.
- Opens in a new window.