ShieldLabs vs ThumbmarkJS
Updated September 2026
Looking for a ThumbmarkJS alternative? ShieldLabs gives enterprise-level functionality without enterprise pricing: risk detection for every visitor, user, device and IP address, and ready-made detection of multi-accounting, account sharing, account takeover and impossible travel with no rules to configure, from 99 USD a month for 25,000 identifications. ThumbmarkJS returns a visitor ID, four risk flags and a danger level for each call, has no risk level for visitors, devices or IP addresses, leaves you to build the detection yourself, and starts at 15 EUR a month.
How ShieldLabs compares to ThumbmarkJS
| Capability |  | ThumbmarkJS |
|---|---|---|
| Overall | ||
| Overall score | 9.7 out of 10 | 7.0 out of 10 (ShieldLabs leads) |
| Getting started | ||
| Integration time | About 5 minutes | Hours to days (ShieldLabs leads) |
| Public pricing and self-serve | Public prices, start without a sales call | Public prices, self-serve Free and Pro plans (comparable) |
| Ease of use | Results in the analytics dashboard with nothing to set up | Flags and a danger level, the detection model is yours to build (ShieldLabs leads) |
| Fit from startup to enterprise | Enterprise-level functionality on every plan, for businesses of all sizes | Self-serve from Free to Pro, then Enterprise (comparable) |
| Documentation and SDKs | Public docs, client and server SDKs | Public docs, client and server SDKs (comparable) |
| API and webhooks | On every plan, including Free | Webhooks on every API plan (comparable) |
| Platform coverage | Web and mobile web | Web, plus Android and Swift libraries last updated in 2024 (comparable) |
| Platform flexibility | Ready-made detection, nothing to configure | No ready detection, you build it yourself (ShieldLabs leads) |
| Detection | ||
| Identification accuracy | 99.9%, network and device intelligence | Device intelligence, with partial network coverage (ShieldLabs leads) |
| Risk signal detection accuracy | 99.9%, network and device intelligence | Device intelligence, with partial network coverage (ShieldLabs leads) |
| Bot and automation detection | Bots, automation and AI agents | Bots and automation, no AI agents (ShieldLabs leads) |
| Breadth of the signal set | 300+ risk signals | 13 raw browser signals plus server data (ShieldLabs leads) |
| Local IP detection | Ready-made, with its country | Not offered (ShieldLabs leads) |
| Geolocation accuracy | Location checked against the local IP and network characteristics, not the public IP alone | From the public IP (ShieldLabs leads) |
| Account clustering | Multi-accounting and account sharing, with a graph | No ready detection, you build it yourself (ShieldLabs leads) |
| Multi-accounting detection | Ready-made, no rules to configure | No ready detection, you build it yourself (ShieldLabs leads) |
| Account sharing detection | Ready-made, no rules to configure | No ready detection, you build it yourself (ShieldLabs leads) |
| Account takeover detection | Ready-made, no rules to configure | No ready detection, you build it yourself (ShieldLabs leads) |
| Impossible travel detection | Ready-made, no rules to configure | No ready detection, you build it yourself (ShieldLabs leads) |
| How the accuracy figure is checked | Published method: what is collected, how the score is built, 1,511 automated tests, audited on more than a million requests | Not published (ShieldLabs leads) |
| Decision and analytics | ||
| Fit to the job | A finished verdict for each detection | An identifier and risk flags, no finished detection (ShieldLabs leads) |
| Risk signal scoring | Ready-made weights for every signal | A 0 to 5 danger level, method not published (ShieldLabs leads) |
| Why a visit was flagged | Every signal that fired, with its weight | Four flags: bot, VPN, Tor and datacenter (comparable) |
| Cost of a false positive | A ready verdict with every reason shown | A ready verdict with every reason shown (comparable) |
| Analytics a non-engineer can read | Traffic, risk and events readable without building anything | A console for API keys (ShieldLabs leads) |
| Latency and real-time decisioning | About 300 milliseconds | About 530 milliseconds (ShieldLabs leads) |
| Decision Risk | Trusted, Suspicious or Dangerous for visitors, users, devices and IPs | No risk level for visitors, users, devices or IPs (ShieldLabs leads) |
| Traffic-quality scoring | Ready-made | Not offered (ShieldLabs leads) |
| Traffic source | Channel and full UTM | Not offered (ShieldLabs leads) |
| History API | On every plan, for every identification | No lookup API, webhooks only (ShieldLabs leads) |
| Pricing | ||
| Free tier | 5,000 identifications, one time | 1,000 API calls a month (comparable) |
| Entry price | From 99 USD a month, 25,000 identifications | About 17 USD a month (15 EUR), 15,000 calls (comparable) |
| Price at 25,000 identifications a month | 99 USD a month | About 29 USD a month (25 EUR) (comparable) |
| Price at 150,000 identifications a month | 399 USD a month | About 173 USD a month (150 EUR) (comparable) |
| Price at 500,000 identifications a month | 999 USD a month | About 577 USD a month (500 EUR) (comparable) |
| Price per identification | From 0.00396 USD down to 0.00200 USD | About 0.00115 USD a call (0.001 EUR), flat at every volume (comparable) |
| Yearly discount | 20%, public | None published, invoiced monthly (ShieldLabs leads) |
| Plans and support | ||
| Features on every plan | Every feature on every plan, including Free | Same signals on every plan, SLA and support on an enterprise contract only (ShieldLabs leads) |
| Data retention | 90 days on every plan | 90 days of raw data (comparable) |
| API requests per second | From 5 to 15 RPS | Not published, fair-use throttling (ShieldLabs leads) |
| Uptime SLA | 99.9% on Scale, self-serve | An enterprise contract only (ShieldLabs leads) |
| Support | Chat and email on every plan, including Free | Discord and email, support on an enterprise contract only (ShieldLabs leads) |
Every competitor cell was checked on their public website and docs, and in our own testing, in September 2026. How ShieldLabs measures 99.9% accuracy
Why choose ShieldLabs
Ready-made detection, no rules to configure
Multi-accounting, account sharing, account takeover and impossible travel come ready, with Medium or High confidence and no rules to configure. With ThumbmarkJS you store its visitor IDs and build each of those detections yourself.
Enterprise-level functionality without enterprise pricing
Every plan carries the full feature set, Free included, with chat and email support, and paid plans start at 99 USD a month for 25,000 identifications. ThumbmarkJS starts at 15 EUR a month for a visitor ID, four risk flags and a danger level, and keeps support and an SLA on an enterprise contract only.
Transparent scoring
Every risk signal carries a published weight, so every score can be traced to the signals behind it. ThumbmarkJS returns a 0 to 5 danger level and does not publish how it is derived, a black box that makes a high level hard to explain.
Risk analytics and investigation
Investigate visitors, devices and IPs, each rated Trusted, Suspicious or Dangerous, and see the overall risk across all your traffic and by source, channel and UTM. ThumbmarkJS describes no analytics beyond a console for API keys, and its API carries no traffic source.
Switch to a ThumbmarkJS alternative without a migration
Both install side by side without conflicting. Add ShieldLabs on the free tier alongside your current ThumbmarkJS setup, compare the data for a week, see the quality for yourself, and switch to ShieldLabs when you are ready.
- 01
Install the ShieldLabs snippet next to ThumbmarkJS in about five minutes.
- 02
Collect 5,000 free identifications on the same traffic.
- 03
Detect risky visitors and users, and compare them with what ThumbmarkJS flags.
- 04
Move to ShieldLabs and prevent abuse of your product.
Frequently asked questions
- What is the best ThumbmarkJS alternative?
- ShieldLabs gives enterprise-level functionality without enterprise pricing: risk detection for every visitor, user, device and IP address, and ready-made detection of multi-accounting, account sharing, account takeover and impossible travel with no rules to configure, from 99 USD a month for 25,000 identifications. ThumbmarkJS returns a visitor ID, four risk flags and a danger level for each call, has no risk level for visitors, devices or IP addresses, leaves you to build the detection yourself, and starts at 15 EUR a month.
- How is ShieldLabs different from ThumbmarkJS?
- Multi-accounting, account sharing, account takeover and impossible travel come ready, with Medium or High confidence and no rules to configure. With ThumbmarkJS you store its visitor IDs and build each of those detections yourself.
- How much does ShieldLabs cost compared to ThumbmarkJS?
- ShieldLabs costs 99 USD a month for 25,000 identifications, 399 USD a month for 150,000 identifications, 999 USD a month for 500,000 identifications, with 5,000 identifications free to start. ThumbmarkJS: About 29 USD a month (25 EUR) at 25,000; About 173 USD a month (150 EUR) at 150,000; About 577 USD a month (500 EUR) at 500,000.
- Can ShieldLabs run alongside ThumbmarkJS?
- Both install side by side without conflicting. Add ShieldLabs on the free tier alongside your current ThumbmarkJS setup, compare the data for a week, see the quality for yourself, and switch to ShieldLabs when you are ready.
Ready to get started?
Start free with 5,000 identifications. Add the snippet once, and the analytics dashboard fills in from your first visitor.