I wish Planet had better pricing for nonprofits. I co-run a conservation nonprofit focused on deforestation in Latin America, and our affordable choices are between 2 year old Google Earth imagery, 10m resolution Nimbo imagery (ok, but not sufficiently detailed to be evidentiary), and Sentinel 1 SAR data, which is useful but very noisy. Planet quoted us something like $30k per year for a strip of coastline that represents something like 5% of the territory we're monitoring, so it's just not a viable option under their current pricing model.
What sort of budget does your org support?
I had to look into ~19 imagery firms for some telco work in Canada last year.
There are private jets that can capture 10cm imagery and can pick the ideal weather window to fly in.
There are also firms that fly balloons 20 - 80 KM off the ground that can capture 4cm imagery.
The space is pretty busy.
What if you used the Sentinel data (in assuming your using the same low res stuff I view in CalTopo) and put that through an AI up scaling type algo and also give it the higher resolution but older imagery ? With a decent amount of dinklsr data it might be able to fairly accurately give you an approximation of what the current high res stuff is.
I suppose you could even train it (maybe) on multiple years / time periods of historical high and low res data before using the latest Sentinel stuff ?
Edit: I'm sure you already know this but I bet for the above the false color IR data could also be especially useful
Have you come across ICEYE? It's a high res commercial SAR constellation, and they have a deforestation monitoring service. They partnered with the Jane Goodall Institute - perhaps you could approach them?
https://www.iceye.com/blog/deforestation-solution-9-essentia...
https://www.iceye.com/newsroom/press-releases/iceye-and-the-...
I have no business other than as a customer but we’ve had decent success with getting cheap archive imagery at fairly high res out of SkyWatch. It’s worth a look. If you need a very large area the price will grow quite a lot though.
Have you considered using https://planetarycomputer.microsoft.com/?
Disclosure: this is run by my team.
Have you discussed requirements with their account managers? They can be a little more creative than their list prices when they realise you don't have the budget for the data you ideally need but are a potential source of recurring revenue. And the EO market is getting more competitive...
If you are looking for evidentiary purposes, does the Sentinel-1 + Nimbo data give you enough to filter the forest-wide data down to specific areas of interest you might want more spatial/temporal resolution? (or as a former colleague once put it when looking for evidence of more localised and heterogenous environmental damage "to find the needle in the haystack, you first remove the haystack"). Particularly if identifying specific areas of interest is a potential route for you to escalate to another party with an active interest and bigger budget...
Your other route to the commercial data you ideally want would be via partnership with EO consultancies with publicly funded R&D projects to showcase their capabilities (easier if you're European, but not a prerequisite). ESA, for example, devotes a lot of funding for private consortia to demonstrate that Copernicus data (coupled with other data where necessary) yields useful results...
It's a while since I worked in this field (in a non-technical role) but happy to share what I learned in more detail - email in profile.