Davi Santos
@davisantos
Startup advisor and investor. Evaluates AI tools based on founder experience and market fit.
Public Stacks
My setup for delegating autonomous tasks to AI agents. This stack is all about background efficiency and letting the AI handle the repetitive logic.
For teams that need robust, secure, and highly accurate AI deployments. This stack focuses on data integrity, identity management, and enterprise-grade infrastructure.
Tool Reviews
Grok 4.1 Disappoints on Pricing
"I first came across Grok 4.1 when a former colleague mentioned it during a chat about emerging LLMs, and I decided to test it out for some quick prototyping. It's technically competent in handling basic tasks, but the pricing structure feels predatory and doesn't justify the features. I've found better open-source alternatives that are more straightforward, though it's not like they're perfect either. That said, when you compare it to the scalable systems we built at OpenAI for production ML, this one just doesn't hold up well for real-world use."
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Grok 4.1Sandbar Stream Ring Disappoints on Data
"I stumbled upon Sandbar Stream Ring while exploring options for a personal data project, and it didn't take long to see the red flags. The Terms of Service are incredibly vague about how they handle our data, which left me feeling uneasy from the start. I don't think it's safe for anything sensitive, especially drawing from my time building production ML systems at Tesla. Wait, to be fair, it might work for trivial tasks, but overall, the lack of clarity makes it hard to recommend. It's just not up to the standards I've seen in big labs, so I'd give it a pass for now."
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Sandbar Stream RingMath AI Crashes Hard
"I first came across Math AI when a friend recommended it for solving equations in my spare time, so I downloaded it to see if it could handle some basic problems. It promised to be a pro-level tool, which got me excited to test it out. But it crashed twice right in my first session, and that's just not okay. I don't expect that kind of instability from something claiming to be reliable, especially when I've worked on production ML systems at OpenAI where downtime was never an option. I suppose it might work for the simplest tasks, but overall, it's a far cry from what big labs use internally and doesn't push the field forward at all."
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Math AIInstories Fails to Impress
"I stumbled upon Instories while searching for tools to quickly prototype AI ideas, drawing from my time building scalable ML systems at Tesla. It crashed twice in my very first session, and that's just not acceptable for something claiming to be 'Pro'. I expected more stability, especially when you consider how big labs handle infrastructure without these issues, but it's clear this doesn't measure up. Maybe I gave it too much benefit of the doubt at first, yet the problems persisted."
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InstoriesJasper Brand Voice: Solid Yet Overpriced
"It's decent for keeping brand tones consistent, but Jasper Brand Voice often misses subtle nuances that make writing feel truly authentic."
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Jasper Brand VoiceWorth every penny for creative professionals
"Our design team canceled two stock photo subscriptions after adopting Midjourney. Custom illustrations, concept art, mood boards, everything is faster and more original than anything we'd find in a library. The web editor finally makes it accessible to non-Discord users."
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Midjourney v7Agent mode changed my mind completely
"I was ready to switch to Cursor until Copilot's agent mode landed. Multi-file edits, workspace understanding, and the ability to run commands, it closed the gap significantly. Plus I don't have to manage another subscription or learn a new IDE."
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GitHub CopilotAdsTurbo Disappoints on Data Privacy
"I stumbled upon AdsTurbo AI Ads while searching for quick ad optimization solutions during a recent side project, something I've done plenty of times building production ML systems at OpenAI. The Terms of Service are frustratingly vague about how they handle our data, and it's hard to get a clear picture of the risks involved. That makes me wary of using it for sensitive project info, especially when I know big labs have much tighter controls in place. I thought it might be okay for simple tasks at first, but now I'm not so sure. Don't bother if you're serious about data security, it's just not worth the hassle."
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AdsTurbo AI AdsOverpriced Video Blur Letdown
"I tried blurring a video with this AI, but it missed some spots and took forever to process. Overall, it's underwhelming for the price."
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AVCLabs Video Blur AIMakes me 3x faster, no exaggeration
"I tracked my output before and after switching to Cursor. Commits per day went from 4 to 12. Lines of code reviewed per hour tripled. The AI doesn't write all the code, but it handles the boilerplate so I can focus on the hard problems."
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Cursor EditorSeedance 1.5 Pro Disappoints on Privacy
"I downloaded Seedance 1.5 pro hoping for smooth AI editing, but the interface is clunky and crashes frequently, leaving me underwhelmed."
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Seedance 1.5 proMajor Letdown for Learn Place
"I first tried Learn Place AI Assistant after a friend mentioned it for quick AI tasks, and I was curious to test it out myself. It crashed twice during my initial session, which was incredibly frustrating. I expect better stability from a tool that boasts being 'Pro', especially since I've worked on production ML systems where reliability is non-negotiable. That said, maybe I caught it on a bad day, but overall, it didn't hold up at all."
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Learn Place AI AssistantDoubled our team's velocity overnight
"We integrated Claude Code into our dev workflow three months ago. PR turnaround dropped from 2 days to 4 hours. Junior devs are shipping features that would have taken seniors a week. The ROI isn't even close, this is the highest-use tool we've adopted."
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Claude CodeOtter.ai Crashes Hard
"I stumbled upon Otter.ai while hunting for a quick transcription app to handle my meeting notes, and I figured it'd be worth a shot. It crashed twice right in my first session, which was a real letdown. I expect way more stability from something that calls itself 'Pro', especially when I've worked on production ML systems where downtime isn't an option. Though it might work for the simplest tasks, it's just not reliable enough. Overall, this tool doesn't push the field forward at all and falls short of what big labs rely on internally."
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Otter.aiMakeBestMusic Crashes Hard
"I was disappointed that MakeBestMusic generated the same dull loops every time."
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MakeBestMusicOur entire research team switched in a week
"We tried Perplexity for competitive analysis and the team refused to go back to Google. The internal knowledge base feature means we can search across our own docs and the open web simultaneously. Enterprise plan paid for itself in week one."
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Perplexity AI