Sure, Miro is awesome.

But have you considered these open source alternatives?

They are free, self-hostable and community-driven.

Check by yourself: Excalidraw , D2 , Affine , tldraw , Draw.io , Scrumlr .

So is Excalidraw

व्हाइटबोर्ड हाथ से बनाई गई जैसी आरेख बनाने के लिए
★ 130K Diagram Whiteboard License: MIT
एक ओपन सोर्स वर्चुअल हाथ से बनाई गई शैली वाला व्हाइटबोर्ड। सहयोगात्मक और एंड-टू-एंड एन्क्रिप्टेड।

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So is D2

Turn text into diagrams
★ 25K Diagram License: MPL-2.0
A modern diagram scripting language that turns text to diagrams.

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So is Affine

आपके ज्ञान-आधार के लिए सहयोगात्मक कार्यस्थल
★ 71.8K Knowledge base Note-taking Collaboration Whiteboard License: MIT
यह अफाइन का कम्युनिटी एडिशन है।

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So is tldraw

Digital whiteboard with infinite canvas
★ 49.9K Diagram License: MIT
Tldraw is a library for creating infinite canvas experiences in React. It's the software behind the digital whiteboard tldraw.com.

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So is Draw.io

JavaScript, client-side editor for general diagramming
★ 62.7K Diagram License: Apache-2.0
Browser-based diagramming components and applications.

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So is Scrumlr

Webapp for collaborative online retrospectives
★ 350 Retrospective Agile Scrum License: MIT
Scrumlr is an online collaboration tool that helps teams reach new heights. Start your first retrospective or collaborative session in an instant - no registration required and completely free and open source.

Read more about Scrumlr