Compare: Spacesheep
A Spacesheep alternative for pages you send.
Spacesheep is where your AI makes a page and your team works on it. HTMLRadar is for the finished page that goes to named people: you choose who can open it, a code to the reader’s e-mail if you want one, and you see which sections each person read. Spacesheep Pro is $4.50 a month (source 3) and HTMLRadar Pro is $19 a month.
Make a tracked link
No file yet
Sources checked on 11 November 2026
Side by side
| What you need | HTMLRadar | Spacesheep |
|---|---|---|
| What you send and what you see | ||
| What it is | You send a web page to named people through a link whose access you control. | “Your AI makes the space; your team reads it, comments on it and builds on it.” It says it is backed by Y Combinator.1 |
| What a page can be | One HTML file, the address of a page you host, or a PDF deck turned into a web page. | Documents, dashboards over live data, forms, bookings and small apps with storage built in, and spaces sent for signature.14 |
| Who can open it | A link per person, a code that proves the reader’s e-mail, a password, company-only access and an expiry, on every plan. Readers need no account. | Five levels: only people invited (the default), invited people who may invite others, a whole team, anyone who signs in, or anyone with the link. Invited readers sign in with Google or an e-mail and a password. Its list of levels has no password or expiry date.2 |
| Reading detail | See who read the page, which sections they read and the time spent on each. | The owner sees lifetime views, unique readers, a 30-day chart, and signed-in readers by name with when they first and last opened. Anonymous readers are counted, not named. Its artifacts page adds “how long they stayed”; its pages do not mention time on a section.45 |
| Changing the page after sending | Replace the page on the same links while keeping their reading history. | Comments pinned to a line or a chart, an AI that edits the space when you write @spacesheep, and every version kept, with the AI that wrote it.46 |
| Publishing from an assistant | Connect your assistant to HTMLRadar to publish pages, update them and check how people read them. | Claude Code, Codex, Cursor, ChatGPT and Grok publish to a space, and its own AI works in the dashboard, Slack and Telegram.1 |
| Plans and prices | ||
| Free plan | Two tracked links with access controls; reading details for the first five readers of each link. | Private, link-only or public pages, with comments, reactions and version history, and 15 spaces a month sent for signature.3 |
| For one sender | Pro is $19 a month or $190 a year. | Pro is $4.50 a month and Max is $9 a month, billed monthly; its plans page shows no annual price.3 |
| For a team | Team: $59 a month for up to 3 senders, or $590 a year. Each extra sender is $15 a month, however you pay, up to 20 senders. | Team is $10 per member a month. Enterprise adds single sign-on, an audit log of publishes, shares and views, and is priced by contact; Pro already covers one custom domain.3 |
HTMLRadar
What you send and what you see
- What it is
- You send a web page to named people through a link whose access you control.
- What a page can be
- One HTML file, the address of a page you host, or a PDF deck turned into a web page.
- Who can open it
- A link per person, a code that proves the reader’s e-mail, a password, company-only access and an expiry, on every plan. Readers need no account.
- Reading detail
- See who read the page, which sections they read and the time spent on each.
- Changing the page after sending
- Replace the page on the same links while keeping their reading history.
- Publishing from an assistant
- Connect your assistant to HTMLRadar to publish pages, update them and check how people read them.
Plans and prices
- Free plan
- Two tracked links with access controls; reading details for the first five readers of each link.
- For one sender
- Pro is $19 a month or $190 a year.
- For a team
- Team: $59 a month for up to 3 senders, or $590 a year. Each extra sender is $15 a month, however you pay, up to 20 senders.
Spacesheep
What you send and what you see
- What it is
- “Your AI makes the space; your team reads it, comments on it and builds on it.” It says it is backed by Y Combinator.1
- What a page can be
- Documents, dashboards over live data, forms, bookings and small apps with storage built in, and spaces sent for signature.14
- Who can open it
- Five levels: only people invited (the default), invited people who may invite others, a whole team, anyone who signs in, or anyone with the link. Invited readers sign in with Google or an e-mail and a password. Its list of levels has no password or expiry date.2
- Reading detail
- The owner sees lifetime views, unique readers, a 30-day chart, and signed-in readers by name with when they first and last opened. Anonymous readers are counted, not named. Its artifacts page adds “how long they stayed”; its pages do not mention time on a section.45
- Changing the page after sending
- Comments pinned to a line or a chart, an AI that edits the space when you write @spacesheep, and every version kept, with the AI that wrote it.46
- Publishing from an assistant
- Claude Code, Codex, Cursor, ChatGPT and Grok publish to a space, and its own AI works in the dashboard, Slack and Telegram.1
Plans and prices
- Free plan
- Private, link-only or public pages, with comments, reactions and version history, and 15 spaces a month sent for signature.3
- For one sender
- Pro is $4.50 a month and Max is $9 a month, billed monthly; its plans page shows no annual price.3
- For a team
- Team is $10 per member a month. Enterprise adds single sign-on, an audit log of publishes, shares and views, and is priced by contact; Pro already covers one custom domain.3
Sources
- 1Spacesheep, home page, checked 11 November 2026.
- 2Spacesheep docs, who can view a space and sharing and links, checked 11 November 2026.
- 3Spacesheep, plans, checked 11 November 2026.
- 4Spacesheep, artifacts page, checked 11 November 2026.
- 5Spacesheep, changelog, the entry “Who read a space, and when”, checked 11 November 2026.
- 6Spacesheep docs, comments and feedback, checked 11 November 2026.
The comparison uses each product's published information. A feature not described on a page is not proof that the product lacks it.
Where HTMLRadar fits
Send your web page. See which part each person read.
Connect your assistant · See HTMLRadar plans
Also compared: display.dev · Pagelive · Qwilr · PandaDoc · ShareDuo · Send · Bauta · Shareable · Digify · dochost · Every comparison
- You choose who can open each link.
- A link per person, a code that proves the reader's e-mail, company-only access, an expiry, and a switch that turns it off.
- You want to try a real send first.
- Two tracked links, free. No credit card.
What Spacesheep has that HTMLRadar does not
An AI that works inside the page: write @spacesheep in a comment and it edits the space while everyone watches. Every version kept, with the AI that wrote it. Dashboards over live data, forms, bookings and small apps with storage built in. Spaces sent for signature. A sync of every version to Google Drive or GitHub. A lower price: Pro is $4.50 a month (sources 1, 3, 4 and 6, checked on 11 November 2026).
Pick Spacesheep to make a page with your AI and work on it with your team. Pick HTMLRadar to send the finished page to people outside the team and see which sections each of them read.
What is the difference between Spacesheep and HTMLRadar?
Spacesheep is where your AI makes a page and your team works on it. It has comments pinned to a line, an AI that edits the page and every version kept (read 11 November 2026). HTMLRadar is for the finished page that goes to named people outside that team. You choose who can open it, a code to the reader’s e-mail if you want one, and you see which sections each person read.
Does Spacesheep show who read a page?
Partly. Its owner analytics show lifetime views, unique readers and a 30-day chart, plus signed-in readers by name with when they first and last opened the page (read 11 November 2026). Anonymous readers are counted, not named. Its pages do not mention time on each section. HTMLRadar reports it, and names each reader by the e-mail they proved.
Do readers need an account to open a Spacesheep page?
On four of its five access levels, yes. Readers sign in with Google or an e-mail and a password (read 11 November 2026). The fifth, anyone with the link, needs no sign-in, and anyone holding the link can open the page. With HTMLRadar a reader opens the link and, if you ask for it, types a code sent to their e-mail. No account.