Tools to analyze the blockchain

[irukandji]

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? 

[Solodoski]

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

[joniboini]

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?

[NotATether]

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

[Kruw]

https://github.com/lontivero/Explora is one. It requires some extra config though.

[nc50lc]

I know Chainanalysis.com runs a service, but I'm not sure they would even want to help.

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.