YC-backed startup product
Listed on Y Combinator as Fall 2025, Artificial Intelligence / SaaS / Automation, based in San Francisco. Official site: aside.com.
ASIDE AI BROWSER · 2026 GUIDE
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Aside AI Browser
YC F25 agentic browserFree agent + Skills on Mac & Windows
QUICK TAKE
Aside is a YC Fall 2025 Chromium AI browser built so an agent can work across the sites you are already logged into—with local memory and an agent-aware password manager. Promising, very new, and worth comparing before you switch.
If you searched for Aside AI Browser, you want a clear product picture—not just launch demos. Here is what Aside claims, what early reviews flag, and how Tabbit approaches the same agentic job.
Opens the official Tabbit product site for your edition.
WHAT IT IS
Aside in one paragraph
Aside positions itself as a browser rebuilt for people and agents—not a chat sidebar bolted onto Chrome. The pitch: ask for real work (messages, dashboards, docs) and let the agent operate websites the way you would.
Agent-first browsing
Marketing focuses on completing tasks across logged-in email, dashboards, internal tools, docs, and spreadsheets without wiring a long integration list.
Local memory narrative
Browsing history is turned into on-device memory so you do not re-explain context every task—Aside says that memory stays local.
Agent password manager
Credentials are autofilled for sites without exposing secrets to the model; sensitive actions (payments, posts, messages) wait for human approval.
CAPABILITIES
What Aside highlights on its homepage
These are product claims from Aside’s marketing and docs—useful as a checklist when you trial the app, not as audited guarantees.
SOTA browser-agent pitch
Aside says it ranks #1 on Online-Mind2Web, BU-Bench-V1, and Odysseys versus Browser Use, GPT, Claude, and Atlas. Independent reviews note these figures are self-reported.
Effort / Ultrabrowse modes
Reviewers describe a reasoning-level control, with a long-horizon mode meant to keep pulling context until a job finishes.
Human-in-the-loop gates
Sensitive actions are meant to pause for confirmation so the agent cannot spend money or post without you.
macOS download path
The public site pushes Download for macOS. Windows availability should be verified on Aside’s own download page before you plan a team rollout.
READ BEFORE YOU SWITCH
Early-product caveats to keep honest
Third-party review coverage (for example eesel’s 2026 write-up) treats Aside as promising but early—not a finished enterprise default.
Very fresh product
Launch buzz and demos outpace long-term production proof. Early users already report bugs typical of week-one software.
Benchmark skepticism
Leaderboard claims live in vendor-controlled repos. Treat them as marketing until replicated by neutral labs.
Pricing opacity
Reviewers note unpublished pricing. Budget planning needs a direct check on Aside’s pricing page or waitlist terms.
Pivot history
YC materials still surface an earlier sales-call assistant story. Confirm you are evaluating the current browser agent product, not the old narrative.
COMPARE
Aside vs Tabbit for agentic work
Both chase “browser that does the work.” The practical differences are maturity signals, platforms, and how you steer the agent day to day.
| Dimension | Aside | Tabbit |
|---|---|---|
| Core idea | Agent operates your logged-in web | Agent mode + Skills for research & automation |
| Platforms | macOS download emphasized | macOS and Windows, free open download |
| Memory / context | Local browsing memory story | @-mention tabs, groups, files as context |
| Trust model | Agent password manager + approval gates | You choose when Agent touches a page; parallel tab groups |
| Proof style | Benchmark-forward homepage | Workflow outcomes: research reports, form fills, Skills |
| Maturity | YC F25 — very early | Public beta with ongoing Agent/Skills releases |
Aside
TabbitCHOOSE
Who should try Aside — and who should try Tabbit
Aside may fit if you…
- Want to experiment with a local-first agent password story
- Are on macOS and comfortable with early YC software
- Care about browser-agent benchmark marketing as a signal
Tabbit is the better first download if you…
- Need a free agentic browser on Windows or Mac today
- Want Agent tasks in separate tab groups while you keep browsing
- Prefer Skills/妙招 for repeatable research and page automation
- Want multi-model access without waiting on unpublished pricing
FAQ
Aside AI Browser questions people ask next
What is Aside AI Browser?+
Aside is an AI-native Chromium browser from a Y Combinator Fall 2025 startup. It markets an in-browser agent that works across sites you are logged into, plus local memory and an agent-oriented password manager.
Is Aside better than ChatGPT Atlas or Browser Use?+
Aside’s homepage claims top scores on selected agent benchmarks, but those numbers are vendor-reported. For daily work, compare task completion, login handling, and privacy controls yourself—or trial Tabbit alongside it.
Does Aside work on Windows?+
Public marketing currently emphasizes macOS downloads. Check Aside’s download page for current Windows support. Tabbit ships free builds for both macOS and Windows.
Is Aside AI Browser free?+
Independent reviews in 2026 noted that pricing was not clearly published. Confirm on aside.com before assuming a free tier.
How is Tabbit different from Aside?+
Tabbit focuses on Agent mode that can research and operate pages in parallel tab groups, @-context from tabs/files, and Skills for reusable workflows—available free on Mac and Windows without a waitlist-first pitch.
Is Aside safe to use with real accounts?+
Aside describes local memory, encrypted secrets, and human approval for sensitive actions. Any AI browser that can act on logged-in sessions still needs careful scoping—start with non-critical accounts and review every payment or post.
Want an agentic browser you can download today?
Tabbit gives you Agent mode, Skills, and multi-model help on macOS and Windows—free, with no invite code.