1. You don't need Slack ($13 / month) as a two person startup — just do email and Skype
2. Notion ($16 / month) — this sounds like a glorified shared note taking app — just use Google Docs, or Dropbox Paper, or text files in a Dropbox folder
3. Sentry ($26 / month) — OK, this might be worth it, but if you have a high volume then it gets expensive — we host our own Sentry instance and past the initial setup it has mostly been a hands off deployment
4. Cloudflare ($20 / month) — not sure why they felt the need to go with the Pro account, maybe they have a lot of page rules, but for us the free account has been more than enough
5. LinkedIn Sales Navigator ($80 / month), SalesQL ($29 / month), Hubspot ($45 per month) — these are sales tools that should pay for themselves and evaluating that is easy, they either get you the leads to monetize or they don't and if not, then they aren't worth the monthly subscription
6. Figma ($24 / month) — I have mixed feelings about it, I haven't seen instances in which such software helped; might be worth it if the results are tangible and it saves you the cost of a designer; this too should be easy to evaluate and if it gets you the same results as drawing on whiteboard or paper, then get rid of it