Preview in:
OSINT investigations Toolkit
OSINT investigators rely on effective online tools that can help in finding more information about a specific person, such as personal details (like an email address or phone number) or even a location.
Besides that, there are plenty of tools that support the research by combining different pieces of information into one bigger picture. Many professional investigation firms, including Nathans Investigations, use advanced digital tools like this to enhance their private investigations and background check processes, ensuring more accurate and efficient results for their clients.
And there are people/face search tools that, in some cases, can help uncover even more about a specific person. Basically, all you need is a photo of that person, ideally, a couple of them.
Best Free OSINT tools for people and face search in 2025
Let’s check how one of the finest reverse face search tools can assist in OSINT investigations.
Lenso.ai - the best people finder tool for OSINT investigations
Lenso.ai is definitely one of the best people finder tools. It has an extremely precise face recognition engine. Thanks to lenso, you can boost your OSINT investigations and:
- search for a missing person
- conduct research about a specific person (politician, well-known personality)
- do a background check
- bring more evidence regarding a specific crime
- detect potential catfish
- reveal a romance scammer
Face recognition on lenso.ai can find matches despite different lighting conditions, angles, and positions. It can match a face in a group photo or find a younger/altered version of a person. It also searches for exact duplicates of a photo. So it is probably the most effective way to find more information about a person using only an image.
Let’s check how it works!
How does lenso.ai work?
1. As we mentioned, all you need is an image. Simply upload it to lenso.ai.
2. Then check the results. You can review all results at once or explore specific categories.
3. If you want to find more face matches, go to the “People” category
4. Check the URL(s) under each image.
5. Filter results by domain or keyword.
.png?updatedAt=1753180517570)
6. Sort image results.
7. Explore other categories and follow the same steps
.png?updatedAt=1753180466270)
It’s an easy to use tool that can reveal a lot of hidden information behind a photo, and it may shed new light on your current investigation.
If you want to check some alternatives, feel free to read our previous article: Best 6 Reverse Image Search Sites to Find People, Places and Duplicates
Create Alerts on lenso.ai for further OSINT investigations
There are situations when you don’t have much information about a person and nothing new shows up, even after manually searching over and over.
With lenso.ai alerts, the platform does the work for you! And the best part? You get 3 alerts for free!
How to set up an alert on lenso.ai?
- Upload an image
- Click “Create an alert” or click the alert button
- Choose a category (the most useful ones are People or Duplicates)
- Save it
As soon as there are new image results under your selected category, you’ll receive an email notification.
Face search API from lenso.ai
If you own an OSINT platform, the face search API from lenso.ai can be an extremely helpful feature. Thanks to this,you can integrate it with your other tools and make the entire investigation process easier and faster.
With the face search API, you can run essentially the same reverse image search as discussed above.
In a single request, you can refine the search category, specify a domain, and set sorting preferences. In return, you’ll receive a list of images (in base64 format),along with URLs to the image and the website where it was originally published, plus a confidence score.
Author
Julia Mykhailiuk
Marketing Specialist
Continue reading
General
AI-Powered Image Tools: From Finding Photos Online to Preparing Them for Official Use
Have you ever looked at a photo and thought where else it might have been used online? Or maybe you need a ready-to-submit passport photo in a short time and have no clue how to get it right? The problem in both cases is that you have to find the right photo and know how to prepare it for official use.
General
Best Online Tools for Image Search and Digital Research
Finding the right information online is not always as simple as typing a few words into a search engine. Sometimes the information you need is contained in an image, while in other situations you may need to work with numbers or technical data to understand what you have found. The right online tools can make these tasks faster and more manageable. For people who regularly work with visual content, research, or digital information, here are some useful tools worth considering.
General
How to find the best images for Google Ads and digital marketing campaigns
If you run out of ideas about where to look for new visuals for your next task, you are in the right place. Let’s check out how to find the best images for any digital marketing campaign.
General
Reverse Image Search Tools 2026: Which One Actually Fits Your Search
"Reverse image search" sounds like a single category of tool, but it isn't. A search built to find a person's face works nothing like one built to prove where a photo first appeared, and neither works like the one most people already use out of habit. Picking the wrong tool for the job is the most common reason a search comes back empty. Here's how nine of the strongest options in 2026 split by function, so you can start with the right one instead of working through all of them.
General
8 Best Reverse Image Search Tools in 2026
You screenshot a profile picture that feels off, or you stumble on a product photo you'd swear you've seen somewhere else. The fastest way to settle it isn't typing a guess into a search bar — it's uploading the image itself. Reverse image search does exactly that: it turns a photo into the query and hands back matching pages, similar images, and sometimes the people or places in the frame. The tools that do this well have multiplied fast, and they're no longer interchangeable. Below is a ranked look at the eight worth knowing in 2026, starting with the one built specifically around AI-driven visual matching.