I’ve got a folder full of AI tools I signed up for, used once, and never opened again. Most were flashy demos that fell apart the second I tried real work. So when I found a post from an AI professional listing 15 tools that are genuinely useful, and honest about which ones are actually free, I stopped scrolling.
What I loved is that the original poster didn’t just drop names. This creator explained what each tool is best at, then flagged the exact spot where the free tier hits a wall. No bait, no hype. I’ve pulled the whole breakdown together for you below, tool by tool.
The 15 tools, and what each one is actually for
- Claude.ai for writing: The author works inside this one all day. Free to start, and best at writing, thinking, and serious tasks. You can teach it your voice and build custom Skills.
- Obsidian.md for a second brain: Free forever for personal use, no catch. Your notes live on your laptop, not on someone’s server. The expert calls it the thinking tool that doesn’t rent your own brain back to you.
- Grok.com for tweet search: Most AI has no idea what happened 20 minutes ago. This one pulls real-time posts straight from X. Free tier, ask, get facts instead of stale links.
- Notion.so for a workspace: The free plan is genuinely usable for one person. It’s where your whole brain lives, now with AI baked in. Still the best workspace, per the original poster.
- Canva.com for design: The non-designer’s design tool, and the free tier is real. Just know the AI features you actually want sit behind Pro. Use it free, but know where the wall is.
- ChatGPT.com for an all-rounder: The default for a reason. Free tier works for most people, good at basic tasks and solid for deep research. The creator notes it loses to Claude where it matters to them.
- Wispr.ai for voice-to-text: Instead of typing prompts, this contributor just talks and Wispr types, learning their edits over time. Free has a weekly word cap, so daily use is paid.
- Granola.ai for meeting notes: Takes notes during the call, silently. It does NOT join like a bot. Free is a trial of a few meetings, then it’s paid.
- Gamma.app for slides: Upload your brand kit and Gamma builds the deck in your branding. Free to start, runs on credits, and free decks carry the Gamma logo.
- ChatGPT for deep search: Solid for quick research on the free tier. The proper Deep Research feature is paid, but free covers most people. Heavy lifting costs.
- Grammarly.com for grammar fixes: The quiet one nobody talks about. Core fixes are free and still catch what the author misses. Boring, but it earns its spot.
- ChatGPT Image for AI images: Shockingly good at text inside images now, and the poster’s go-to for quick visuals. Free is rate-limited fast, so you’ll feel the cap.
- notebooklm.google for learning from sources: Free and generous, no card needed. Upload up to 50 sources, even YouTube links, and it turns your courses into podcasts and mindmaps.
- Claude.ai for coding: Same login, same free tier. The reason this professional switched, because it gets things right on the first try, not the fifth.
- gemini.google.com for multilingual: Free and strong at text inside images in any language. Hindi, Spanish, anything, clean and editable.
The honest free breakdown
Here’s the part I appreciated most. The original poster didn’t pretend everything is free forever. This is the real split:
- 8 tools are truly free: Claude, Obsidian, Grok, Notion, ChatGPT, Grammarly, NotebookLM, and Gemini.
- 5 are free with real limits: Canva Pro features, Wispr’s weekly cap, Granola’s trial, Gamma’s credits, and ChatGPT’s Deep Research and image caps.
Why this matters: knowing where the free wall sits before you commit saves you from building a workflow around a tool that quietly starts charging you the moment you rely on it.
How to actually use this list
A list of 15 tools is useless if you try to adopt all of them at once. I’ve watched people do that and burn out by Wednesday. Here’s the smarter play, built on the creator’s own advice:
- Pick one gap first: Writing, notes, slides, or research. Just one.
- Match a truly free tool to it: Start where there’s no card and no trial clock ticking.
- Run it for a full week: Real work, not a test drive. That’s how you learn if it sticks.
- Only then add a second: Layer tools slowly so each one earns its place.
What ties this together is a bigger shift. The best AI stack right now isn’t one giant app that does everything. It’s a handful of focused tools, each great at one job, most of them free to start. That’s a much friendlier entry point than paying for a suite before you know what you need.
I think the real win here is permission to keep it simple. You don’t need the flashy stuff. You need the boring tools that quietly do the work, like this savvy professional pointed out with Grammarly.
Want the full context and the poster’s own notes on each pick? Check out the complete LinkedIn post, then go try one tool this week. Your future workflow will thank you.