Founder stacks
solo founders
The solo founder starter stack
For founders doing every job at once, on a budget that notices.
Tools: ChatGPT, Gamma, Canva (Magic Studio), Zapier.
AI tools, in plain English.
No tool is best for everyone. Start from the job you do or the task in front of you. We keep it even-handed.
01 · How this guide works
None of these tools is best. Each is better or worse for a specific job, and that is the only claim we make.
- Every fact carries a last-checked date, because prices, plans and model versions change fast.
- What you can safely put into each tool differs, so always check its data-governance terms first.
02BY JOB
- Getting started14 tools
- Marketing32 tools
- Founders & entrepreneurs49 tools
- Software development24 tools
- Design & creative21 tools
- Sales17 tools
- Customer support12 tools
- Operations30 tools
- Product management17 tools
- Data & analytics8 tools
- Finance10 tools
- HR & recruiting9 tools
- Education & training15 tools
- Consulting & strategy21 tools
- Legal & compliance12 tools
- Content creators12 tools
- Real estate11 tools
- E-commerce & retail10 tools
- AI agents & automation9 tools
- Productivity & personal assistant11 tools
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Take the quiz →03BY TASK
- Writing & research19
- Coding & software development22
- Image generation10
- Image editing9
- Video generation & editing11
- Automation & agents25
- Search & knowledge retrieval17
- Data analysis & spreadsheets9
- Customer support & chatbots9
- Presentations & documents12
- Marketing content & SEO15
- Design, UI & prototyping13
- Meeting notes & productivity12
- Audio, voice & transcription5
- Private, local & self-hosted13
04STACKS
Tools that work together
Popular tool stacks
Ready: start today, free or near-free. Competitive: the professional standard. World-Class: governed, at scale.
Operations stacks
solo operators
The operations starter stack
For the one person running the whole back office, who needs the operation documented before it can ever be delegated.
Tools: Notion AI, Scribe, ChatGPT.
E-commerce stacks
first storefronts
The starter shop stack
For sellers making a storefront look credible before it can pay for help.
Tools: Photoroom, CapCut, ChatGPT.
Marketing stacks
lean marketers
The lean content stack
For solo marketers and small teams publishing consistently on a budget that notices.
Tools: ChatGPT, Writesonic, Canva (Magic Studio).
Sales stacks
first outbound
The starter sales stack
For founders running their first outbound by hand, on a budget that notices.
Tools: Apollo.io, ChatGPT, Attio.
Research stacks
consultants, analysts and students
The research-to-deck stack
For consultants, analysts and students who turn source material into presentable conclusions.
Tools: Perplexity, NotebookLM, Gamma.
Automation stacks
no-code ops
The starter automation stack
For a solo operator wiring up their first automations without code.
Tools: Zapier, ChatGPT, Scribe.
Data stacks
spreadsheet users
The starter data stack
For anyone whose data lives in spreadsheets and should stay there.
Tools: Gemini for Sheets, Julius AI.
05COMPARE
Every pairing here opens a written comparison. Don't see your pair? Pin both tools in the catalogue to compare specs side by side.
or one of 145 written verdicts:
- Claude vs ChatGPT Both are excellent general assistants, and most people would be well served by either. Pick Claude when long documents, careful reasoning and prose quality carry the work; pick ChatGPT for wider everyday range, image generation and hands-on data analysis. Many professionals genuinely run both.
- ChatGPT vs Google Gemini Capability is close enough that your ecosystem should decide. Pick Gemini if your work lives in Gmail, Docs and Google Workspace, where it is genuinely native; pick ChatGPT for the broader toolset, stronger consumer ecosystem and agent features. Gemini's free tier gives away more; ChatGPT's habit is harder to leave.
- Claude vs Google Gemini These two overlap least of the big three, which makes the choice cleaner. Pick Claude when the finished prose and careful reasoning are the product; pick Gemini for enormous context capacity, integrated research and native life inside Google Workspace. Writers lean Claude, Google-native teams lean Gemini.
- ChatGPT vs Microsoft Copilot This is a capability-versus-governance decision. Pick ChatGPT for the stronger raw assistant, image tools and hands-on analysis; pick Microsoft Copilot when the work must stay inside your Microsoft 365 tenant, grounded in your own files, under governance IT has already approved. Enterprises often run Copilot broadly and ChatGPT for power users.
- Cursor vs GitHub Copilot Pick Cursor when you want the editor itself rebuilt around AI, with the deepest codebase context and agentic multi-file edits; pick GitHub Copilot for AI woven through the workflow you already have, from completions in your current editor to agents and review inside GitHub. Ambition favours Cursor; integration favours Copilot.
- Cursor vs Devin Desktop Pick Cursor when you want the most refined AI-native editor: deep codebase context, precise control over agentic edits, and the largest ecosystem and mindshare. Pick Devin Desktop, formerly Windsurf, when you want an agent manager first and an editor second: since the June 2026 rename it opens on the Agent Command Center, a board for local and cloud agents, and hosts third-party agents through the Agent Client Protocol. Cursor is the safer editor bet; Devin Desktop is a bet on supervising agents becoming the job.
06ALL TOOLS
Browse and compare all tools
Filter by cost, ease, privacy and output. Pin up to four to compare side by side.
Every tool is assessed even-handedly: none is best for everyone, only better or worse for a specific job.
Tool facts carry a last checked date, because prices, plans and model versions change fast.
Listings are editorial: no tool is sponsored or pays for its placement.
07ABOUT
What Agentarius is
Agentarius is an independent guide to AI tools, written for people who have a job to do rather than a stack to admire. The market moves weekly, and the useful question is almost never which tool is best. It is which one fits the work in front of you, at a price you can justify, with limits you can live with.
It is built for owners, managers and small teams making a practical choice without a specialist to ask. Everything is arranged around the work itself, by role and by task, so you can start from what you are trying to get done instead of from a product category you would have to learn first.
Tools earn their place by assessment, not by application. Each is judged on what it genuinely does well, who it suits, what it costs and where it falls short, with close alternatives set beside it so the trade-off is visible. Claims that matter, such as a free tier or a usage limit, are checked rather than repeated, and every tool page carries the month its details were last confirmed.
Independence here is a commercial arrangement, not a slogan. Nothing on this site can be bought: not a listing, not a ranking, not a recommendation. There are no sponsored placements and no affiliate arrangements with any tool covered, which means nothing you read is shaped by who pays. Where the guide gets something wrong, corrections are welcome and the change is logged with its date.
Where to start
Not sure what to adopt first?
Five quick questions about your job, task and constraints. We'll suggest your top three tools, plus the one to try first.