There are a handful of issues with Ecosia. I would clarify here though at this stage - if you are looking to DeGoogle or similar, swapping your search engine (Google) for Ecosia would be a smart move.
Note: I don't think everyone will be as far along on this journey as us, so we try not to look down on anyone who is trying to do the right thing by shifting off Big Tech. But we just want to point out that there are some concerns with using Ecosia if you think it is the most ethical search engine. And of course, most ethical is also a very difficult term to pin down, one which will mean very different things based upon your own personal values.
Issue 1 - Ecosia is built upon Microsoft Bing technology
You could probably argue this point about all the modern web browsers too - nearly all of them are built upon Google Chrome (or Chromium) therefore they are also going to be problematic. And some people do feel this way - and hence won't use a Chromium based browser.
But we feel that the problem with using a version of Bing search is difficult for an ethical browser because of the fact that they will be funded by Microsoft, in the sense that, the ads shown on Ecosia are delivered by the Microsoft Advertising network. And Microsoft then shares a portion of that ad revenue with Ecosia.
So - when you use Ecosia (and click on ads) you are also jointly funding Microsoft - who are clearly Big Tech.
This is obviously not very clearly stated when you go to Ecosia - all you see is the images of trees being planted, the focus on fighting climate change, being an ethical search engine, and so on.
Issue 2 - Ecosia's entire model is built upon advertising
The above point leads us nicely to this one - which is by far the biggest issue for us.
We believe a big part of the issue around Big Tech is that it pushes consumption at every possible opportunity. Consumption in terms of screentime (addictive algorithms, endless scrolling social feeds, etc) but also in terms of buying things you probably don't really need.
And so the problem here is with the business model. How is it ethical that a search engine is funded by this form of surveillance capitalism, whereby when you search a keyword, an advert will show up?
This is often billed as being the cost of free products - clearly you don't pay to use many search engines (although there are some nowadays) - as instead you have to put up with the adverts.
Ecosia's entire model is built around people clicking on ads because this is how they earn money. Without the adverts, and people clicking/buying more stuff, no trees get planted.
There have been countless studies around how it is our endless consumption addiction in the Global North which is actually the root cause of our ecological problems.
So how can Ecosia justify this model which feels quite paradoxical - and how can it get away with such blatent greenwashing?
Issue 3 - Ecosia's adoption of AI search
At this point hopefully the issues with Ecosia are clear, but there are other points to be considered, including their adoption of AI search, claiming that this is what their users want.
Not only this but it doesn't seem (at time of writing) that you can disable this or easily opt out - unlike what DuckDuckGo have offered with their no AI search (external link).
Ecosia continue the greenwashing here with statements like - "AI that answers to the planet" simply because it uses less energy than normal AI models. Surely this still uses more energy than a no-AI search engine - so what better way to answer to the planet then by rejecting the use of AI?
They also talk about the production of clean energy, leading to more renewable energy in the grid. Again, we should be more mindful of greenwashing around usage of solar panels and such terms - we should be conscious that really, there is no more sustainable action than the reduction of energy usage and consumption in the Global North.