AI & ML
AI and machine learning certifications
From the AWS AI Practitioner to the IBM AI Engineering certificate — which AI credential fits your role, and which ones vendors already retired.
For working tech professionals
Which certification is actually worth your time?
SkillStack is a plain-English guide to tech certifications and courses: what each credential costs, how long it takes to prepare, how long it stays valid, and what employers actually ask for. Written from experience, in plain English, with zero jargon where possible.
What we cover
Data
Data engineering and analytics
AWS, Azure, GCP, Snowflake, and Databricks data certs compared head to head — exam cost, prep time, and salary premiums.
Cloud
Cloud certifications
Which cloud cert pays off first depends on the cloud your employers run. The comparison, by platform.
Management
Product and project management
PMP, CAPM, and product management certificates — what hiring managers actually value, and what they ignore.
Security
Cybersecurity certifications
Entry paths for career changers and the certs that matter once you're in — Security+, CISSP, and the Google Cybersecurity Certificate.
Career switches
Coding bootcamps and career changes
Bootcamps judged on job-placement evidence, not marketing claims — plus when a free course beats a paid one.
First guides
New guides publish daily. First up:
- Best AI certifications for working engineers in 2026
- Best data engineering certifications: AWS vs Azure vs GCP vs Snowflake
- AWS vs Azure vs GCP: which cloud certification pays off first
- Google Data Analytics vs IBM Data Science: which certificate is actually worth it
- Best coding bootcamps that actually place engineers
- Best PMP and project management certifications for tech PMs
- Coursera Plus vs buying courses one at a time: the math
- Best cybersecurity certifications for career changers
- Best product management certifications for tech PMs
- Free vs paid tech courses: when paying is worth it
Why this site exists
Certifications are a crowded market: hundreds of credentials, vendors retiring exams with little warning, and a lot of marketing dressed up as advice. The default outcome is spending months studying for a badge nobody asks for. These guides document the ones that actually move a career — with the exam cost, prep time, and employer demand to prove it. More about SkillStack →