user61726: Do I have to download the whole bitcoin blockchain (145GB) to be able to do a sendMany transaction with Bitcoin Core? 
Are there other Desktop Software, where I can do a masspayout? 
Maybe an App, where I can read a CSV like this:
address amount,
address amount,
...

user26481: Electrum is an SPV wallet which means you don't need to download the entire blockchain. It will be up and running in a few minutes
It has a handy sendtomany feature where you can even upload a csv file

61726: <p>Do I have to download the whole bitcoin blockchain (145GB) to be able to do a sendMany transaction with <a href="https://bitcoin.org/en/download" rel="nofollow noreferrer">Bitcoin Core</a>? </p>

<p>Are there other Desktop Software, where I can do a masspayout? </p>

<p>Maybe an App, where I can read a CSV like this:</p>

<p>address amount,</p>

<p>address amount,</p>

<p>...</p>
 26481: <p>Electrum is an <a href="https://bitcoin.stackexchange.com/questions/4649/what-is-an-spv-client">SPV wallet</a> which means you don't need to download the entire blockchain. It will be up and running in a few minutes</p>

<p>It has a handy <a href="http://docs.electrum.org/en/latest/faq.html#can-i-do-bulk-payments-with-electrum" rel="nofollow noreferrer">sendtomany</a> feature where you can even upload a csv file</p>
