Uptime monitoring isn’t a new category. There are a lot of solid tools out there, and if you’re evaluating options in 2026, you deserve an honest look at the field, including where we honestly think we rank. Here’s our take on the five tools worth knowing about, starting with our own.
1. Tethered
We’re putting ourselves at the top of this list, and we want to earn that rather than just claim it. Tethered offers unlimited monitors and unlimited integrations on a genuinely free-forever plan, no trial period, no credit card, no quiet downgrade after 30 days. On top of website, port, keyword, and SSL monitoring, every downtime alert is cross-checked from an independent network location before it reaches you, which means fewer false alarms without needing a paid tier to get there. Status pages are fully customizable from day one, and alerts can reach you by email, SMS, phone call, Slack, Discord, and more.
The honest trade-off: we’re a small, focused team, so if you need deep infrastructure observability alongside uptime checks, a larger platform might suit you better. If what you need is dependable, unlimited uptime monitoring that stays free as you grow, that’s exactly what we built.
2. UptimeRobot
UptimeRobot has been the default starting point for a lot of small businesses for years, and its free plan is genuinely generous compared to most of the industry: up to 50 monitors at 5-minute intervals. Where it starts to feel limiting is integrations (capped at 5 on the free tier) and status pages, which stay basic unless you upgrade.
Where Tethered differs: our free plan doesn’t cap monitors or integrations at all, both are unlimited, permanently. Status pages are fully customizable from day one, not gated behind a paid tier. We’ve laid out the full side-by-side on our UptimeRobot alternative page.
3. Better Stack (formerly Better Uptime)
Better Stack has built a genuinely polished product, especially if you want incident management and on-call scheduling bundled with your monitoring. It’s a strong choice for engineering teams that already live in that workflow. The trade-off is that the free tier is narrow, and the pricing scales quickly once you add monitors, seats, or retention.
Where Tethered differs: we’re built specifically for the case where “just tell me when it’s down, reliably, for free” is the whole requirement, with no seat-based pricing to think about as your monitor count grows.
4. Pingdom
Pingdom (now part of SolarWinds) is one of the most established names in the space, with strong synthetic monitoring and performance insights beyond simple up/down checks. It’s a mature, capable product if performance analytics are your main concern.
Where Tethered differs: Pingdom doesn’t offer a meaningful free tier for ongoing monitoring, you’re paying from day one. For businesses that just need dependable uptime, keyword, port, and SSL monitoring without a performance-analytics price tag attached, Tethered covers that core need at no cost.
5. StatusCake
StatusCake‘s free plan is one of the more usable ones on the market, with a reasonable number of free monitors and no credit card required to start. It’s a fair, no-nonsense option if you want something lightweight.
Where Tethered differs: where StatusCake’s free tier still caps monitor count, ours doesn’t. If you’re managing dozens of sites, subdomains, or client projects, that ceiling doesn’t exist for you on Tethered.
How they compare
A quick side-by-side of the free tier for each, since that’s what most small businesses actually start on:
| Tool | Free plan | Monitors (free) | Integrations (free) | Status pages | Check frequency |
|---|---|---|---|---|---|
| Tethered | Forever, no card required | Unlimited | Unlimited | Fully customizable | 5 min |
| UptimeRobot | Yes | 50 | 5 | Basic (customizable on paid tiers) | 5 min |
| Better Stack | Limited free tier | Limited | Limited | Customizable on paid tiers | Varies by plan |
| Pingdom | No ongoing free tier | N/A | N/A | Paid tiers only | Varies by plan |
| StatusCake | Yes | Limited | Limited | Basic (customizable on paid tiers) | Varies by plan |
Exact limits on competitor plans change from time to time, so treat the table above as directionally accurate and check each provider’s own pricing page for the current numbers. Tethered’s numbers won’t change: unlimited stays unlimited.
The pattern
Almost every tool on this list makes the same trade-off somewhere: cap the free tier to protect the paid one. We built Tethered around a different bet: that a genuinely unlimited free plan, funded by optional add-ons instead of artificial limits, is better for small businesses and still sustainable for us. Almost three years in, that bet is still paying off (we wrote more about why we built it this way, and how we keep it free, if you’re interested in the longer story).
If you want to see the difference for yourself, start monitoring for free. No card required, no monitor cap, ever.
Frequently asked questions
Is Tethered actually free, or is there a hidden paid tier?
The core monitoring plan is free forever: unlimited monitors, unlimited integrations, no credit card required. We fund the business through optional add-ons for teams that want extra features, never by limiting the free plan.
How does Tethered compare to UptimeRobot’s free plan specifically?
UptimeRobot’s free plan caps you at 50 monitors and 5 integrations. Tethered doesn’t cap either. See our full UptimeRobot comparison for the details.
Do I need a credit card to sign up for Tethered?
No. You can create an account and start monitoring without entering any payment details.
Can I monitor more than one website on the free plan?
Yes, and there’s no cap on how many. Unlimited monitors are included on the free plan, whether you’re watching one site or a hundred.
Which uptime monitoring tool is best for a small business on a budget?
If budget is the deciding factor, Tethered and UptimeRobot are the strongest free options on this list. Tethered’s advantage is that nothing is capped as you grow, so you won’t hit a wall (or a paywall) as your monitor count increases.