- Home
- AI Summarizers
- Sidenote
Sidenote
Whittlesey, United Kingdom
What it is
Sidenote is an AI reading assistant that answers questions about browser documents and points to the passages supporting each answer. Selecting a citation scrolls to and highlights the source text. It can summarize and explain documents, build glossaries, search files, and organize reading with notes, highlights, tags, starred documents, and collections. Sidenote reads browser-rendered PDFs, including scanned PDFs with OCR, and accepts PDF, DOCX, PPTX, TXT, MD, MDX, and RTF uploads. Integrations include Confluence, Notion, Google Docs, Slack canvases, SharePoint, and OneDrive. Extensions are listed for Chrome, Edge, and Firefox; Opera is coming soon. The Free plan costs nothing, while Pro costs £10 a month billed monthly. A seven-day Pro trial requires no card but limits users to 10 documents, 20 summaries, and 10 chat turns. Documents are stored in the UK, and users can choose Store or Discard retention.
For and against
For
- Citations jump to highlighted source passages
- Handles scanned PDFs with OCR
- Supports many document upload formats
- Offers broad workplace integrations
- Provides configurable document retention
Against
- Free plan allows three documents monthly
- Seven-day trial has usage limits
- Opera extension is not yet available
- Sidenote is not yet SOC 2 certified
The verdict
Sidenote combines document questioning with source-linked answers and extensive reading tools. Compare plan caps and its current compliance status with your organization’s requirements.
Who it suits
Sidenote suits research, engineering, product, legal, operations, and customer-success teams working with browser documents. It is useful for readers who want cited answers and organized document collections.
Plans and prices
Free
3 documents/month · 5 MB/document · 10 summaries/month · 10 explanations/month
Read 29 Sep 2026 · getsidenote.app
Pro
25 documents/month · 20 MB/document · 75 summaries/month · 70 explanations/month
Read 29 Sep 2026 · getsidenote.app
Team (annual billing)
Pro-level caps per member · shared team collections · SAML SSO with domain auto-join · team owners/admins get Confluence indexing at 500 pages/month
Read 29 Sep 2026 · getsidenote.app
Team
Pro-level caps per member · shared team collections · SAML SSO with domain auto-join · team owners/admins get Confluence indexing at 500 pages/month
Read 29 Sep 2026 · getsidenote.app
Pro+
50 documents/month · 40 MB/document · 150 summaries/month · 140 explanations/month
Read 29 Sep 2026 · getsidenote.app
Pro Max
250 documents/month · 75 MB/document · 750 summaries/month · 700 explanations/month
Read 29 Sep 2026 · getsidenote.app
On the record
- Browser availability
- The site lists Chrome, Edge, and Firefox extensions, with Opera described as coming soon.getsidenote.app · read 29 Sep 2026
- Cited answers
- Answers cite source passages, and clicking a citation scrolls to and highlights the passage in the page.getsidenote.app · read 29 Sep 2026
- Compliance limit
- Sidenote says it is not yet SOC 2 certified and that formal attestation is on its roadmap.getsidenote.app · read 29 Sep 2026
- Data residency
- Documents are stored in Supabase in the UK eu-west-2 London region, encrypted at rest and isolated per account with row-level security.getsidenote.app · read 29 Sep 2026
- Document tools
- Features include summaries, explanations, glossaries, multi-document collections, document search, notes, highlights, tags, and starred documents.getsidenote.app · read 29 Sep 2026
- File support
- Sidenote reads browser-rendered PDFs, including scanned PDFs with OCR, and accepts PDF, DOCX, PPTX, TXT, MD, MDX, and RTF uploads.getsidenote.app · read 29 Sep 2026
- Integrations
- Dedicated integrations include Confluence, Notion, Google Docs, Slack canvases, SharePoint, and OneDrive.getsidenote.app · read 29 Sep 2026
- Privacy
- The maker says user content is never used to train AI models and its AI providers use no-training defaults on the API tiers used.getsidenote.app · read 29 Sep 2026
- Retention
- Users can choose Store retention while the account is open or Discard, which purges a document within 24 hours; users can also delete library documents at any time.getsidenote.app · read 29 Sep 2026
- Support
- The maker lists support by email at [email protected] and says it is supported by its solo developer, Lewis Hadden.getsidenote.app · read 29 Sep 2026
- Trial
- The 7-day Pro trial requires no card and has limits including 10 documents, 20 summaries, and 10 chat turns.getsidenote.app · read 29 Sep 2026
- What it does
- Sidenote is an AI reading assistant that answers questions about documents in the browser and shows where each answer came from.getsidenote.app · read 29 Sep 2026
- Who it is for
- The maker describes use cases for engineering, product, customer success, legal and operations, and research teams.getsidenote.app · read 29 Sep 2026
