How do their growth rates compare?

Astra AI has a month-over-month growth rate of +40.3%; Overlayer (Devoteam Knowledge Services) has —.

How does pricing compare?

Astra AI: Freemium, Paid. Freemium with paid upgrades. A free tier lets students start without a credit card; Astra AI Plus is aimed at everyday learning and a higher tier called Sigma targets serious exam studying. Annual and monthly billing options are available. Check the official pricing page for current rates. Overlayer (Devoteam Knowledge Services): Free (enterprise licensing via vendor). The Chrome extension is free to install and use within your Google Workspace tenant; enterprise rollout, governance and support terms are handled through Devoteam. The Chrome Web Store listing does not publish a per-seat price, so check with Devoteam for organizational licensing.

What are alternatives to Astra AI and Overlayer (Devoteam Knowledge Services)?

Other tools in related categories include ChatGPT, Gizmo, Solvely AI, Knowt, Brilliant.

Astra AI vs Overlayer (Devoteam Knowledge Services) — Traffic (7.36M vs 0), Pricing & Verdict

Open AI Tools

Astra AI vs Overlayer (Devoteam Knowledge Services) — Traffic (7.36M vs 0), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Astra AI	Overlayer (Devoteam Knowledge Services)
Official Domain	astra-ai.co	chromewebstore.google.com
Pricing Model	Freemium, Paid	Free (enterprise licensing via vendor)
Monthly Visits	7.36M (7,356,157)	0 (0)
MoM Traffic Delta	+2.11M (+40.3%)	0 (—)
Primary Market & Share	🇻🇳 Vietnam (14.3%)	🌐 Global (—)
Direct Visits / mo	2.36M	0
User Rating	4.3	4.2
Supported Platforms	Website	Browser Extension

Astra AI

Your personal AI tutor for every subject, from notes to exam day.

Exam Prep Study Plans

Upload your notes, slides or past papers, set your exam date and target grade, and Astra assembles a topic-by-topic revision plan built around exactly what you'll be tested on.

Step-by-Step AI Tutor

Ask by typing, speaking or snapping a photo. The tutor explains concepts at your level, asks follow-up questions and keeps going until the idea actually clicks.

Multi-Format Learning

Generate guided lessons, flashcards, quizzes, true/false and smart-text exercises, plus an auto-generated podcast so every learning style is covered.

Graded Mock Exams

Practise with realistic oral and timed written mock exams that get graded, so you know where you stand before the real thing.

Strengths & Pros

+Builds study plans from your own notes and past papers, not random internet content
+Wide format variety: chat, quizzes, flashcards, podcasts and mock exams in one place
+Free to start with no credit card required
+Strong social proof with millions of students and high app-store ratings

Frequently Asked Questions: Astra AI vs Overlayer (Devoteam Knowledge Services)

Astra AI has 7,356,157 monthly visits, while Overlayer (Devoteam Knowledge Services) has 0. Traffic estimates describe audience size, not product quality.