- Is it safe? We have not read the data policy of Underanchor yet. Read it on the official site before you upload anything.underanchor.com ↗
- Is it free? Free plan · pricing page, read Oct 28, 2026See ↓
- What else does this?
Read Aloud Readerfree
PDF to Markdown
LetXfreeSee ↓
not read yet
Use
- For
- Researchers and students writing LaTeX papers that must cite source PDFs, reviewed by a supervisor.
- Price
- Free planpricing page, read Oct 28, 2026
- Used for
- Anchor each LaTeX sentence to its supporting source paragraph
- Flag sentences that lack a source
- Has an MCP server (1 in the registry)public registry →
- Publishes llms.txt, a file written for AI assistantsunderanchor.com ↗
Free plan
- MCP servercom.underanchor/underanchorverified in the MCP registry
- Stateanswers, requires sign-inchecked 2026-10-28
- Address to connectunderanchor.com/mcp
This card as JSON, for your agent →
Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.
Figure and bar: visits/mo, estimate · year: online since
- #1
Read Aloud Reader
Converts pasted text, PDFs, DOCX, EPUB files or article URLs into speech using neural voices, with sentence highlighting and MP3 export.
1.4kActive - #2
PDF to Markdown
Reads PDFs and writes Markdown, rebuilding headings, lists, tables and links from OCR and layout analysis.
8ActiveFrom $190/yr - #3
LetXMCP · sign-in
Compiles LaTeX documents to PDF in a browser, with real-time co-editing by several authors at once.
1.2kActiveFrom $18/mo2026 - #4
GoodSignMCP · open
Collects signatures on uploaded PDFs via emailed links, logging each open and signature to an audit trail.
995ActiveFrom $1.50 per use - #5
HighlytMCP · sign-in
Tags highlights in PDFs by purpose, links them across documents, and serves them to Claude or ChatGPT through MCP.
4Active
Not it? Say what you need
betaThree tools from the Atlas for the job you describe, each with what fits and what does not.
No notes yet. What do you use Underanchor for?
Sign in to leave a noteWhat is Underanchor?
Writes LaTeX documents where each sentence links to the exact PDF paragraph that supports it, flagging unsourced sentences. It is listed in the Atlas under Documents.
Who is Underanchor for?
Researchers and students writing LaTeX papers that must cite source PDFs, reviewed by a supervisor.
How much does Underanchor cost?
Underanchor has a free plan, per its pricing page on 2026-10-28.
Is Underanchor free?
Yes, Underanchor has a free plan, per its pricing page on 2026-10-28.
What are alternatives to Underanchor?
In Documents, by use: Read Aloud Reader, PDF to Markdown, LetX, GoodSign, Highlyt.
How we read a tool
No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.
- Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
- Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
- Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
- The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.
How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.
How we read every tool → · By INITE Atlas Desk
Cookies
Before we count this visit
Analytics and ad measurement tell us which pages and which of our ads do their job: Google Analytics and Google Ads, the Meta pixel, Yandex Metrica, and one first-party id of our own. Nothing is stored until you answer, and declining changes nothing about the site.