Is sider.ai safe?
http://sider.ai/
Checked on
How we checked
Coverage: strong · 5 of 6 applicable core capabilities
- Antivirus (60 of 93 engines answered) · saved result: did not fully complete
- Google Safe Browsing: completed
- page reading: completed
- page capture: completed
- domain records: completed
- web research: completed
Sider AI is a legitimate, well-established AI browser assistant with disclosed ownership and clear contact details, but its restrictive refund policy and a stale antivirus flag warrant caution.
Sider AI (sider.ai) is a SaaS platform offering an AI-powered browser sidebar and assistant, operated by Vidline Inc. in Boston, MA. The site has been registered for over 1,300 days, uses valid TLS encryption, and is not flagged by the browser threat feed. It provides a domain-specific contact email, a phone number, and a physical postal address. However, the refund policy is restrictive, and one antivirus engine flagged the domain in a stale report. Independent research found a user review mentioning difficulty cancelling a monthly subscription. Overall, the site presents as a legitimate commercial service with some consumer-unfriendly billing practices.
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Where this site sits
- Dangerous1–20
- High Risk21–44
- Moderate Risk45–69
- Low Risk70–84
- Safe85–100
The score combines saved evidence strength and analysis quality. Coverage is reported separately.
Why 78/100
Low Risk covers scores 70–84. 3 findings pulled the score down; 4 pushed it up.
What pulled the score down
- Strong1 independent antivirus family reported an adverse result. This comes from a saved antivirus observation rather than a new submission, so treat the detection as real but confirm the timing.
- ModerateThe refund policy is restrictive, with no refunds for partially used periods and limited refunds for yearly plans.
- MinorA user review mentioned difficulty finding where to cancel the monthly subscription, resulting in an unwanted charge.
What pushed the score up
- SupportsThe domain is 1356 days old, indicating an established presence.
- SupportsThe site provides a domain-specific email, phone number, and postal address.
- SupportsValid TLS encryption is in place.
- SupportsThe browser threat feed reports no threat.
No points per finding are stored for this report: our analysis weighed all findings together to set the score. Each finding shows its saved severity instead (Decisive, Strong, Moderate or Minor). Community reviews never change the Safety Score.
01 · Investigation Brief
Investigation Brief
Sider AI (sider.ai) is a SaaS platform offering an AI-powered browser sidebar and assistant, operated by Vidline Inc. in Boston, MA. The site has been registered for over 1,300 days, uses valid TLS encryption, and is not flagged by the browser threat feed. It provides a domain-specific contact email, a phone number, and a physical postal address. However, the refund policy is restrictive, and one antivirus engine flagged the domain in a stale report. Independent research found a user review mentioning difficulty cancelling a monthly subscription. Overall, the site presents as a legitimate commercial service with some consumer-unfriendly billing practices.
Disclosed Operator and Contact Details
The site clearly identifies its operator: Vidline Inc., 335 Huntington Ave #35, Boston, MA 02115-4406, United States. This information appears in the Terms of Use, and the site also lists a contact email on its own domain (care@sider.ai), a phone number (02115-4406), and a postal address. These are supportive signals that the service is not hiding its identity.
Subscription Model and Refund Policy
Sider AI operates on a subscription model with plans such as Nano, Lite, Pro, Max, and an Education Plan. Payments are processed via Stripe and Antom. The refund policy states that fees are non-refundable except for duplicate or erroneous charges, and there are no refunds for partially used periods. A user review on an independent review platform mentioned difficulty finding where to cancel the monthly subscription, which led to an unwanted charge. This suggests a potential friction point for customers trying to manage their subscriptions.
Technical Security and Reputation
The domain is over 1,300 days old and uses a valid TLS certificate. The browser threat feed reports no threat, and the hosting IP has an abuse confidence score of 0/100. However, one antivirus engine (Chong Lua Dao) flagged the domain as malicious in a stale report. This single detection is not corroborated by other major security vendors and may be a false positive, but it is worth noting.
Why the score is 78
The saved checks found no material threat, but the evidence was not strong enough for the highest Safe tier. Coverage remains separate so missing sources cannot be mistaken for clean results.
02 · Security Evidence
Security evidence
Antivirus Engines
1/ 93
detectionsSaved analysis from October 30, 2026 - stale
1 engine flagged this URL
Every saved adverse engine is listed below. The full provider matrix remains available for audit.
- Malicious
- 1
- Suspicious
- 0
- Total
- 93
| Engine | Finding |
|---|---|
| Chong Lua DaoMalicious | malicious |
All 93 engine results
- Chong Lua Dao - Malicious
- 0xSI_f33d - Unrated
- Abusix - Clean
- Acronis - Clean
- ADMINUSLabs - Clean
- AILabs (MONITORAPP) - Clean
- AlienVault - Clean
- alphaMountain.ai - Clean
- AlphaSOC - Unrated
- Antiy-AVL - Clean
- ArcSight Threat Intelligence - Unrated
- AutoShun - Unrated
- Bfore.Ai PreCrime - Unrated
- BitDefender - Clean
- Bkav - Unrated
- BlockList - Clean
- Blueliv - Clean
- Certego - Clean
- ChainPatrol - Unrated
- CINS Army - Clean
- CRDF - Clean
- Criminal IP - Unrated
- CSIS Security Group - Unrated
- CTX AI - Clean
- Cyan - Unrated
- Cyble - Clean
- CyRadar - Clean
- desenmascara.me - Clean
- DNS8 - Unrated
- Dr.Web - Clean
- EmergingThreats - Clean
- Emsisoft - Clean
- Ermes - Unrated
- ESET - Clean
- ESTsecurity - Clean
- Forcepoint ThreatSeeker - Clean
- Fortinet - Clean
- Fortra - Unrated
- G-Data - Clean
- GCP Abuse Intelligence - Unrated
- Google Safe Browsing - Clean
- GreenSnow - Clean
- GreyNoise - Unrated
- Gridinsoft - Unrated
- Guardpot - Unrated
- Heimdal Security - Clean
- Hunt.io Intelligence - Unrated
- IPsum - Clean
- Juniper Networks - Clean
- K7AntiVirus - Unrated
- Kaspersky - Clean
- LevelBlue - Clean
- Lionic - Clean
- Lumu - Unrated
- Malwared - Clean
- MalwarePatrol - Clean
- MalwareURL - Unrated
- Mimecast - Unrated
- Netcraft - Unrated
- OpenPhish - Clean
- Orcapot - Unrated
- PhishFort - Unrated
- Phishing Database - Clean
- Phishtank - Clean
- PREBYTES - Clean
- PrecisionSec - Unrated
- Quick Heal - Clean
- Quttera - Clean
- Rising - Clean
- SafeToOpen - Unrated
- Sangfor - Clean
- Sansec eComscan - Unrated
- Scantitan - Clean
- SCUMWARE.org - Clean
- Seclookup - Clean
- Snort IP sample list - Unrated
- SOCRadar - Unrated
- Sophos - Clean
- StopForumSpam - Clean
- Sucuri SiteCheck - Clean
- Synthient - Unrated
- ThreatHive - Clean
- URLhaus - Clean
- URLQuery - Unrated
- Viettel Threat Intelligence - Clean
- VIPRE - Clean
- ViriBack - Clean
- VX Vault - Clean
- Webroot - Clean
- Xcitium Verdict Cloud - Clean
- Yandex Safebrowsing - Clean
- ZeroCERT - Clean
- ZeroFox - Unrated
How security vendors categorise this site
- alphaMountain.aiInformation Technology, AI/ML Applications
- BitDefenderim
- Forcepoint ThreatSeekergenerative ai - conversation
- Googletechnology
- Sophosinformation technology
Each vendor’s own label for the site, saved with the antivirus result. Labels are separate from the engine verdicts above and can disagree with each other.
Security Scans
Checked against the browser threat feeds available to this scan — no hit.
What we observed
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Visual context from the captured page
The homepage features a clear value proposition for an AI browser sidebar, with prominent 'Add to Chrome' CTAs and social proof (10M+ users, 100K+ 5-star ratings).
What the captured page showed
1 observation- 01
The homepage features a clear value proposition for an AI browser sidebar, with prominent 'Add to Chrome' CTAs and social proof (10M+ users, 100K+ 5-star ratings).
What the page says about itself
What the site says about itself, quoted from the pages we read. The site wrote these words; they are not our findings.
- Page title
AI Sidebar & Agent for the Browser | Sider AI
- Meta description
Research faster with Sider AI—summarize web pages, take notes, generate reports, and chat with leading AI models. Powered by ChatGPT, Gemini, Claude, Grok, Deepseek, etc. Try the best AI sidebar now!
Pages we read
- Main page/Read
- Terms/policies/termsRead
- Contact page/contactRead
- Pricing/education-pricingRead
03 · Investigation Story
Investigation story
What the site claims
AI Sidebar & Agent for the Browser | Sider AI
What we observed
The page content was captured and checked alongside 60 antivirus results.
What independent research found
1 external finding was saved and compared with the page evidence.
What remains unverified
1 of the 6 applicable core capabilities did not complete, so those gaps remain visible in the coverage ledger.
What kind of site and risk is this?
Threat category
No threat category confirmed
Service and business model
Saas
Observed behavior
Evidence behind this classification
- 01The domain is 1356 days old, indicating an established presence.
- 02The site provides a domain-specific email, phone number, and postal address.
- 03The browser threat feed reports no threat.
Web research findings
Independent findings for sider.ai, including public complaints, named review sources, registration records, and look-alike-domain evidence. A missing result is shown as unverified, never converted into a clean bill of health.
No independently sourced scam reports or credibility records were found for sider.ai. That is common for new or low-traffic sites and does not clear the site.
Reputation Sources
How this domain rates across independent threat-intelligence and blocklist providers.
04 · Domain & Infrastructure
Domain & infrastructure
The plumbing behind the site — who registered it, how it’s encrypted, where it’s hosted, and where it links out. A valid certificate or a calm server doesn’t mean the business is honest — scam sites pass these checks too. Use this to corroborate the verdict, not to overturn it.
Infrastructure map
How the saved page connected to the wider web.
- Domainsider.ai
- Redirects tosider.ai
- Hosted byCloudflare, Inc.
- Referencesgoogletagmanager.com · assets.churnkey.co
Domain Timeline
- Feb 14, 2023Domain registered
First appeared in WHOIS records — 3 years old when this review was saved.
- Nov 1, 2026Saved security review — Rated Low Risk
This saved scan found no material threat, but the evidence was not strong enough for the highest Safe tier.
sider.ai has operated for years and this review found no material threat — a long track record, though it is never a guarantee on its own.
Contact Verification
Saved contact details can help identify the operator. Their presence supports traceability; it does not prove the business is trustworthy.
- Contact email on the site's own domain (care@sider.ai).
- Phone number listed (02115-4406).
- Postal address visible on the page.
Domain & Encryption
Cloudflare DNS is used by legitimate and scam sites alike, so it does not identify who runs the site.
Certificate issued for sider.ai.
A shared Cloudflare address answers for many sites, so it is not the site's own server and says nothing about who runs it.
Analytics and ads
- Google Tag Manager
Payment providers the page loads
None seen among the outside domains we saved.
Read from the first 20 outside domains the page loads and the shop platform it uses; the web server and platform rows are under Hosting & Technology. A payment script on the page does not prove the shop accepts that method at checkout, or that you are protected.
Redirect Chain
- 1301http://sider.ai/
- 2200https://sider.ai/
Server Reputation
Referenced Domains
Outbound domains this page links to or loads resources from. Each links to its own security scan.
05 · Evidence Ledger
Evidence ledger
- Antiviruspartial
- Browser threat feedcomplete
- Page contentcomplete
- Analysiscomplete
- Visual evidencecomplete
The conclusion is supported by the evidence saved with this report.
Technical threat
suspiciousMalware, phishing, credential theft and hostile infrastructure.
1 independent antivirus family reported an adverse result. This comes from a saved antivirus observation rather than a new submission, so treat the detection as real but confirm the timing.
Operator / customer risk
suspiciousComplaints, withdrawals, business conduct and commercial traps.
The refund policy is restrictive, with no refunds for partially used periods and limited refunds for yearly plans. · A user review mentioned difficulty finding where to cancel the monthly subscription, resulting in an unwanted charge.
Source coverage and freshness
Status shows whether usable evidence was saved; finding shows what that evidence observed.
| Source | Result | Completion | Finding | Freshness |
|---|---|---|---|---|
| Antivirus | 1 of 93 engines flagged | Limited | Adverse | stale fallback · analysed Oct 30, 2026 |
| Browser protection | No browser threat-list match | Completed | No adverse finding | this scan · Nov 1, 2026 |
| Page content | Page fetched · HTTP 200 | Completed | No adverse finding | this scan · Nov 1, 2026 |
| Visual evidence | 1 visible observation saved with the page capture | Completed | No adverse finding | this scan · Nov 1, 2026 |
| Independent research | 1 independent finding was saved | Completed | No adverse finding | this scan · Nov 1, 2026 |
- Antivirus
- Result1 of 93 engines flagged
- CompletionLimitedFindingAdverse
- Freshnessstale fallback · analysed Oct 30, 2026
- Browser protection
- ResultNo browser threat-list match
- CompletionCompletedFindingNo adverse finding
- Freshnessthis scan · Nov 1, 2026
- Page content
- ResultPage fetched · HTTP 200
- CompletionCompletedFindingNo adverse finding
- Freshnessthis scan · Nov 1, 2026
- Visual evidence
- Result1 visible observation saved with the page capture
- CompletionCompletedFindingNo adverse finding
- Freshnessthis scan · Nov 1, 2026
- Independent research
- Result1 independent finding was saved
- CompletionCompletedFindingNo adverse finding
- Freshnessthis scan · Nov 1, 2026
07 · Safety FAQ
Safety FAQ
Common questions, answered directly from the scan data above — so the answers reflect the saved verdict and evidence in this report.
Is sider.ai a scam or is it safe?
Is sider.ai safe to use?
Has sider.ai been flagged by antivirus engines?
Is sider.ai on any phishing or malware blacklists?
How old is the sider.ai domain?
Does sider.ai have a valid SSL certificate?
Where is sider.ai hosted?
Is sider.ai a well-known website?
How often is the sider.ai report updated?
08 · Final Verdict
Final verdict
Sider AI is a legitimate, well-established AI browser assistant with disclosed ownership and clear contact details, but its restrictive refund policy and a stale antivirus flag warrant caution.
Sider AI (sider.ai) is a SaaS platform offering an AI-powered browser sidebar and assistant, operated by Vidline Inc. in Boston, MA. The site has been registered for over 1,300 days, uses valid TLS encryption, and is not flagged by the browser threat feed. It provides a domain-specific contact email, a phone number, and a physical postal address. However, the refund policy is restrictive, and one antivirus engine flagged the domain in a stale report. Independent research found a user review mentioning difficulty cancelling a monthly subscription. Overall, the site presents as a legitimate commercial service with some consumer-unfriendly billing practices.
09 · Community
Community
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