We notice one consistent thing: these purpose of organizations/institutions isn't as simple as "serve the best for the native population that they are supposed to save from natural/economic/humanitarian disaster". The need (say, for regional/program directors) to find the next funding to keep the project going trumps EVERY OTHER altruistic purpose. Also, these program directors don't stay for longer than 2-3 years (let alone getting to know the native population they are trying to help) and most of them are always trying to get in on the next action/conflict in another country, and/or to simply move to a better pasture (a more developed country). The management in these non-profit orgs--such as save the children, world vision, UNICEF--are always whitewashed (I do not intend this to come out negatively, but have to keep it real here) and they rarely promote native workers to have a say in things that matter (although native workers are the ones who have to do the day-to-day, on-the-field hard work). On Facebook, there has been a growing resentment by native workers toward these 'foreigners of ruling hierarchy' that work for non-profits (while taking up most of the salary+benefits and wasting donation money). I don't know how far it will go and am interested to see it out.
Never trust a name, as more often than not it just has been hijacked by the most powerful/lucky marketing group.
https://www.accessnow.org/financials/
Trusting anything immediately is a bad habit to develop anyway.
For example, in the links you provided, we can see that AccessNow is supported by Google and Facebook, but also by Mozilla, which is generally considered to be a strong privacy advocate. Similarly, CDT is supported by Google and Facebook, but also by DuckDuckGo and Mozilla.
So what can we conclude from this? I'm not really sure. It could be any of:
1. Mozilla, DuckDuckGo, etc. are supporting organizations that are working against the interests of privacy.
2. Google and Facebook actually care about privacy.
3. Privacy is a complicated issue and there aren't really well-defined "sides" to take.
Here's the pattern: "First, do some harm. Reap gains from it. Then atone, and reap power from the atonement."
Anand Giridharadas has this all down. Best book you can read right now if you're interested in this topic.
This is why it's important to view a wide range of sources, but who has time for that really.