Bitcoin Forum

What tools are available to analyze the bitcoin blockchain?
I know Chainanalysis.com runs a service, but I'm not sure they would even want to help.
Are there any open source tools? Or any tools? 

We technically do this with blockchain explorers, Mempool.space, Blockchain.com Explorer, BTCscan.org, Blockstream.info but since you want to use an extended tools, have you tried Numisight another alternative for you if dont like Chainanalysis. Numisight is still in alpha stage so most features dont work completely, and honestly I have never tried it.

Some other options;

https://www.walletexplorer.com/
https://github.com/gianlucamazza/bitcoin-blockchain-analysis-tool

Knowing what kind of problem you're trying to solve might help people suggest the right tools. Are you trying to track a scammer, recover your stolen Bitcoin (which probably requires more than looking at where your money goes), or something else?

Why do you think Chainalysis won't help you btw? Is it because of the fees?

What joniboni said. What kind of analysis are you considering to do?

https://github.com/lontivero/Explora is one. It requires some extra config (https://github.com/lontivero/Explora/issues/2#issuecomment-2842241910) though.

Since you've mentioned that service, are you looking for tools that can check an address' "risk score" on custodial services that use such scoring system?
If so, you may try to use Blockchair Blockexplorer for that purpose, their latest update added that feature.

But take note that it's not the most private way of checking an address
Specially since it's passed on their blockchain analysis partners to check when attempting to get some results.
And the result may be different from other service's result or what you expect since those analysis aren't based from accurate data but from known heuristics and guesswork.

I think MistTrack (https://light.misttrack.io/) could be helpful for you. To give you a better sense of the kind of information this service provides I’ve included the transaction graph for address bc1qykh0vep5a567x8yhlrq0yefhyyteg5sv7dejd2 below. As you can see, it shows the transaction amounts, data, destination and source addresses, and even some doxing information on destination addresses. The best part of this info it’s all free.

https://explorer.bitquery.io/bitcoin or https://github.com/Blockstream/esplora

There are alternatives like these. For someone with a node, there are a few more alternatives:

https://github.com/janoside/btc-rpc-explorer

It may be free, but does it collect all your address data and sends it to some server?

Because I think that would hardly be private if that is the case, because there wouldn't be a point in checking your own wallet's graph if somebody could just instantly blacklist you just for looking.

The OP was looking for the specific online tool and they found it. That said, I believe the OP is smart enough to mask their IP using a VPN ^{preferably the multi-hop VPN} or TOR when accessing that tool. Besides, they might just be checking the graph of a wallet that doesn’t even belong to them, but to some stranger ^{let’s say toNotATether, why not, your signature-campaign address is publicly known:D}.

https://intel.arkm.com/

Arkham is #1 in terms of this, im surprised no one in the replies have mentioned it?

You mean their visualizer tool, didn't you?

Cood tool but 1) is is available only after login which is not convenient for many of us 2) presented info is less informative ^{in my view}. For comparison I have added Arkham visualization relevant to bc1qykh0vep5a567x8yhlrq0yefhyyteg5sv7dejd2 address already analyzed by MistTrack mentioned in one of my above posts.

Arkham's visualizer would help, It is good for quick overview, but the login requirement is kidda stressful when you want to check something fatst.. And also the data is a bit limited, more visual than detailed. Here is the link in case you want to try it out:   https://intel.arkm.com/ (https://intel.arkm.com/)

Then probably for indepth analysis, I just stick with OXT which gives more insight into clustering and transaction patterns, and BTC RPC Explorer  https://github.com/janoside/btc-rpc-explorer (https://github.com/janoside/btc-rpc-explorer).. if you run your own node. These are little more technical, but once you become used to them, you’ll get more out of It…

Arkham’s visualizer is great for a quick glance but it requires a login, which can be time wasting but if u are not fast about getting the info I also will recommend Arkham’s visualizer.


@OP I also recommend you check out OXT and BTC RPC explorer for more in-depth analysis

OXT shut down last year.

Surprised no one brought up GraphSense yet https://graphsense.info. It's open-source and pretty powerful for transaction graph analysis and clustering, though the setup is a bit of a beast (needs PostgreSQL, Elastic, etc.). Still, if you’re into digging deep, it might be worth a look.
I’ve been on the hunt for something that can tag and track specific addresses over time, maybe even notify me if funds move. Doesn’t have to be fancy. Open source or freemium would be great. Anyone using something like that?