Synthesis vs Formative
A detailed comparison to help you choose between Synthesis and Formative.
🏆
Verdict: Formative wins
Formative scores 4.2/5, edging out Synthesis at 3.6/5. K-12 teachers and schools that want live visibility into student thinking during instruction — especially math, science and multilingual classrooms needing varied response types and standards-tagged data.
Synthesis AI learning platform for ambitious kids | Formative Real-time assessment platform for classroom formative evaluation | |
|---|---|---|
| Rating | 3.6 (1 review) | 4.2 (1 review) |
| Pricing Model | paid | freemium |
| Starting Price | From $35/mo | Free tier available |
| Best For | Families with two or more children in the 5-11 range who want a voice-led, concept-first math tutor and can use the family plan rather than individual pricing. | K-12 teachers and schools that want live visibility into student thinking during instruction — especially math, science and multilingual classrooms needing varied response types and standards-tagged data. |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | — | free tierteam features |
| Visit Synthesis → | Visit Formative → |
Synthesis
Pros
- + The Socratic voice loop is the real thing: in my sessions the tutor probed specific misconceptions verbally before letting the child advance
- + Family pricing is exceptional value — the advertised $119/year for up to 7 kids undercuts nearly every paid math programme on the market
- + Read-aloud of all text and answer choices for under-7s, with adjustable voice speed, makes it usable for pre-fluent readers
- + Adaptive sequencing targets shaky sub-skills with fresh problem sets rather than generic repetition
- + 7-day free trial with no credit card lowers the barrier to actually testing it with your own child
Cons
- - Explanations are scripted: a child stuck on one method gets the same method re-arranged, not a different teaching strategy
- - The headline efficacy claims rest on a DARPA study of 36 Navy sailors — adults, different subject — with no independent evaluation on children
- - Individual pricing ($45/month listed) is steep for single-child households
- - Maths only; no reading, writing or science coverage
- - The pricing page displays conflicting plan blocks ($45/$348 individual alongside $29/$119 family promos), so the actual checkout price is hard to pin down
Formative
Pros
- + Live response view shows student work as it is created — in my use this is the strongest mid-lesson intervention workflow in the assessment category
- + Response breadth beats quiz tools: drawing/whiteboard, graphing, equations, image annotation, audio and video responses alongside 20+ item types
- + Real digitisation of old material — upload a PDF or Doc and add response fields to it instead of rebuilding
- + Pricing is concrete and moderate: $249/teacher/year with a genuinely usable Free Teacher plan and a 14-day trial without a credit card (formative.com/plans, at time of writing)
- + District depth is real: standards dashboards, common assessments, Item Bank, Respondus LockDown, and Luna Configuration Studio for district AI guardrails
Cons
- - Collaboration is gated — shared libraries, common assessments and org dashboards require the school tier or above; no family/caregiver access at all
- - AI scoring of complex open-ended work is uneven and needs teacher review (consistent with a 21-teacher AIME 2025 pilot); no plagiarism checking
- - Since February 5, 2026 new monthly subscriptions are gone — individuals must buy annual despite school-year-shaped need; plan names keep changing post-Newsela
- - Video embeds depend on YouTube, which many districts block; a long-running user complaint without a built-in video-hosting alternative
- - Item formats skew to right/wrong answers; richer demonstration of learning needs custom rubric work on top
Frequently Asked Questions
Which is better, Synthesis or Formative?▼
Formative scores higher at 4.2/5 vs 3.6/5 for Synthesis, making it the better-rated option in our comparison.
What is the difference between Synthesis and Formative?▼
Synthesis: Synthesis Tutor is an adaptive maths tutor for primary-age children, available on iPad and desktop, that adjusts to each child's pace. Formative: Formative is a classroom assessment tool that shows teachers each student's work as they do it, so they can respond during the lesson.
Is Synthesis or Formative more affordable?▼
Synthesis starts at €35/mo, Formative starts at €0/mo. Check the comparison table above for current pricing.
Stay in the loop
Get weekly updates on the best new AI tools, deals, and comparisons.
No spam. Unsubscribe anytime.