AI browsers and extensions
Sider: review, pricing, data and alternatives
Sider lets browser users access multiple models in a sidebar, summarize pages and YouTube videos, and ask questions about documents. It also translates content, automates browser actions, and generates images and presentations. A free tier exists. Access and transparency score: 55/100, #2 of 6 in its category.
| Access | 15/30 | |
|---|---|---|
| Openness | 10/30 | |
| Trust | 30/40 |
What is Sider?
Sider lets browser users access multiple models in a sidebar, summarize pages and YouTube videos, and ask questions about documents. It also translates content, automates browser actions, and generates images and presentations.
According to its documentation, Sider lets you:
- use multiple models in a sidebar
- summarize pages and YouTube videos
- ask questions about documents
- translate pages, PDFs, and images
- automate actions in the browser
- generate images and presentations
We file it under AI browsers and extensions, the category of tools to use AI right in your browser, and it also overlaps with general AI chatbots and aI for documents and PDFs. The category lists 6 verified tools on this site.
The publisher is Vidline Inc., based in United States. The service launched in 2023, which gives it some track record.
Who is it for?
It is mostly useful to these profiles: students, content writers, and researchers. The need it covers is simple to state: use AI right in your browser.
Sider is a good candidate if:
- you want to try before paying
- you also work from your phone
Before deciding, run a trial on a real task and measure the time saved: it is the only criterion that really counts.
How much does Sider cost?
Pricing model: freemium (limited free use, then paid). A free plan is offered, usually limited in volume or features.
The entry price is not shown publicly: you have to contact the publisher or create an account to see it.
To estimate what the same work would cost done directly with an AI model, use our API price calculator. Prices change often: always check the official site before subscribing.
Data and privacy
According to its privacy policy, data is processed in several regions depending on the plan.
Exporting your content: TXT et images pour les conversations. Being able to get your data back makes switching tools easier later.
Three habits apply to every AI tool:
- turn off the use of your content for training if the option exists
- use a work account separate from your personal account
- review everything the tool produces before publishing or sending it
Platforms, languages and API
Sider runs on: web browser, Windows, macOS, iPhone and iPad, Android, and browser extension.
Interface languages: English.
API availability is not documented.
How we scored it
Our 55/100 score does not judge output quality: it measures what can be publicly verified about access to the tool, its openness and how far the publisher can be trusted.
| Criterion | Points | What counts |
|---|---|---|
| Access | 15/30 | free tier, published price, French interface |
| Openness | 10/30 | API, data export, open code |
| Trust | 30/40 | identified publisher, declared hosting, age, presence in reference lists |
The full calculation is explained on our method page.
Comparison with alternatives
Sider against other tools in the aI browsers and extensions category:
| Tool | Free | Entry price | API | Score |
|---|---|---|---|---|
| Sider | Yes | not published | – | 55 |
| Comet | Yes | $20 per month | – | 55 |
| Monica | Yes | $99 per year | Yes | 55 |
| Merlin | Yes | $19 per month | No | 48 |
| Dia | Yes | $20 per month | – | 40 |
| Opera Neon | Yes | $19.9 per month | – | 40 |
Verdict
Sider is among the most accessible and transparent tools in its category.
Strengths
- Free tier to try it
- Established since 2023
- Available on many platforms
Limitations
- Price not published
Alternatives
- Cometfree tier
- Monicafree tier
- Merlinfree tier
- Diafree tier
- Opera Neonfree tier
Categories and jobs
Learn more
Frequently asked questions
Is Sider free?
Yes, a free plan exists, with usage limits.
Where is Sider data stored?
According to the publisher, in several regions depending on the plan.
Does Sider have an API?
It is not documented.
What are the alternatives to Sider?
In the same category: Comet, Monica, Merlin, and Dia.
Sider or Comet: which one to choose?
Our score is 55/100 for Sider and 55/100 for Comet. Try both on the same task before paying.
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Neutrality. No affiliate links. No vendor pays to be reviewed, rated or ranked. Reviews are directed by François Chollet, neutral and factual, and every data point is dated and sourced. How we score