Slot trackers, alerts and booking services do different jobs. This page compares how services gather availability information, notify applicants and handle bookings.
Last updated: 30 September 2026
This comparison is published by VisaHurry, one of the services discussed below.
Every popular tool can tell you a slot opened. The applicants who lose slots lose them in the minutes after that.
Slots in India often open at odd hours and disappear in minutes. An email or app notification you see at 8 AM is a history lesson, not an alert. Public reviews of every alert tool — including the biggest ones — repeat this theme: the alert came, the slot was already gone.
Crowdsourced trackers see the portal through their users' extensions, so freshness depends on when someone's browser last checked. That works well at scale, but it means the data can trail reality — in a market where minutes decide outcomes.
Even a perfect alert leaves you racing hundreds of other subscribers to log in, navigate to the calendar, and click first. For OFC + consular pairs (H1B and other interview cases), you also have to complete both bookings without fumbling the sequence.
Based on each service's own public descriptions as of July 2026. Details and pricing change — always verify on their sites.
| Service | What it is | How you're notified | Who books the slot | Pricing model | Login sharing needed? |
|---|---|---|---|---|---|
| CheckVisaSlots | Crowdsourced availability tracker (browser extension + app) with alert plans; also offers booking assistance | App/email/Telegram-style notifications on paid plans | You (community plans); agents available separately | Free tracker; subscription for alerts — current pricing on their site | No for alerts |
| VisaSlots.info | Crowdsourced Chrome-extension tracker | Extension/site data you check yourself | You | Free | No |
| VisaGrader | Availability tracker by country and visa type | Site data you check yourself | You | Free to browse | No |
| VisaHurry | Human-led: staff verify slots manually and log every check publicly at visahurry.com/slots/ | Your phone rings (call alerts, ₹10,000/6 months) — or we handle it entirely | You (call alerts) or VisaHurry books for you (India plans priced by visa category) | Call alerts: fixed 6-month fee with an initial payment. Booking plans: most pay after success; urgent H1B/H4 cases require a disclosed advance | No for call alerts; yes for done-for-you booking (explained first, change password after) |
What the others do better than us, stated plainly: the crowdsourced tools aggregate far more raw data points than any human team can, most of them cost nothing to try, and if you are fast, awake and flexible, a free tracker plus quick reflexes genuinely can be enough. We're not the cheap option — we're the option for people whose time, sleep or interview deadline is worth more than the fee.
Different situations, different right answers — including the free ones.
You have months of runway, flexible dates, and you enjoy checking availability yourself. VisaGrader for browsing trends, CheckVisaSlots' free tier for community data. Start free — you can always escalate.
You're glued to your phone during working hours and your target window is weeks away. CheckVisaSlots' paid alerts are the established option here. Just be honest with yourself about whether you'll catch a 2 AM notification.
You keep missing notification-based alerts, you won't share your login with anyone, and you want a human-verified signal that wakes you up. That's VisaHurry's call alert plan: ₹10,000 for 6 months, your phone rings when we verify a matching slot, you book it yourself.
You have a hard deadline (joining date, semester start, expiring stamping window) and can't afford to lose the race twice. A team monitors and books inside your own profile — and with VisaHurry's listed India plans, your fee depends on the visa category. Most cases pay after success; urgent H1B/H4 cases require a disclosed advance. See the current category prices and refund terms.
One warning that applies to every option: no tool or service controls when embassies release slots, and anyone guaranteeing a specific date is lying. If you're comparing paid services, check the red flags and questions to ask below first — and if an agent has already burned you, the scam recovery guide is free.
Any one of these on its own is reason enough to stop the conversation.
A trustworthy service answers all six clearly. VisaHurry's own answers are included so you can hold us to the same standard.
| Question | Answer you should hear | VisaHurry's answer |
|---|---|---|
| Do you use bots or extensions? | A clear no, with an explanation of the manual process. | No. People check availability and book manually. |
| When do I pay? | Clear terms in writing before work starts. | Listed India booking plans are paid after a successful booking unless a plan clearly states otherwise. |
| Can you guarantee a date? | An honest no. | No. Embassies control slot releases. |
| What access do you need? | A specific, limited answer, and confirmation you can change your password after booking. | Call alerts need no login. Done-for-you booking needs profile access; we explain exactly what and why first, and you should change your password after. |
| Are you affiliated with the embassy or government? | No. Anyone claiming otherwise is lying. | No. VisaHurry is an independent service, not a government body or law firm. |
| What happens if you can't find a slot? | Clear refund or no-charge terms. | On pay-after-booking India plans, no successful booking means no booking fee. |
Extension-based trackers read the appointment portal from users' browsers. Before you install one, know where the risk lands.
What applicants comparing slot services ask most.
It depends on what is failing for you. If you want free availability data, VisaGrader is worth trying. If you keep missing alerts because they arrive as emails or app notifications, a phone-call alert service like VisaHurry's (INR 10,000 for 6 months) is built for exactly that problem. If you don't want to do the booking race at all, human-led booking assistance is a separate option. Most cases pay after successful booking; urgent H1B/H4 cases require a disclosed advance.
CheckVisaSlots is a real, widely used crowdsourced availability tracker — it is not a scam. Like any crowdsourced tool, its data depends on when other users' extensions last saw the portal, so public reviews are mixed: some users book within days, others report alerts arriving after slots are already gone. It is not affiliated with the US government, and neither is any other slot service, including VisaHurry.
Because H1B, F1 and B1/B2 slots in India often vanish within minutes, and email or app notifications are easy to miss at 2 AM or in a meeting. By the time many applicants open the portal, log in and reach the calendar, the date is gone. That gap is why phone-call alerts and done-for-you booking exist: a ringing phone wakes you up, and a team that is already logged in books faster than someone reacting to a notification.
Most popular tools — CheckVisaSlots' community plans, VisaSlots.info, VisaGrader — are trackers or alert services: they tell you a slot exists and you race to book it yourself. Done-for-you booking, where a human team monitors and completes the booking inside your own appointment profile, is a different category. VisaHurry works this way, with listed India plans payable after the slot is successfully booked.
CheckVisaSlots is primarily a crowdsourced data tool: extensions installed by thousands of users report what they see, and you receive alerts to act on yourself. VisaHurry is a human-led service: real people verify slots and either ring your phone so you can book (call alerts, INR 10,000 for 6 months, no login sharing) or complete the booking for you. Most booking cases pay after success; urgent H1B/H4 cases require a disclosed advance. VisaHurry also publishes every verified slot check publicly at visahurry.com/slots/ with timestamps, including checks that found nothing.
Watch for guaranteed dates or approvals, full payment upfront without written terms, claims of embassy contacts or internal quotas, no verifiable contact details, pressure to pay within minutes, and refusal to explain how the booking is done. Verify the plan, refund terms and payment recipient before paying.
Alert-only services never need your login. Done-for-you booking usually does, because the booking happens inside your own profile. Share access only after you have written terms, and change your password immediately after the booking.
The official scheduling portal's terms prohibit automated access, and in March 2025 the US Mission in India reported cancelling about 2,000 appointments made by bots and suspending the associated scheduling privileges. The consequences fall on the applicant's account, so weigh that risk before installing any tool that reads the portal.
For help with an appointment, send us your visa category and preferred dates.
