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OutSystems alternatives: 5 apps ranked by verified data

Facts checked Oct 25, 2026AppBreakup editorialHow we rank

Common reasons people leave OutSystems: quote-based pricing that is expensive for small teams, and requires trained developers. We ranked 5 alternatives by how directly each one replaces OutSystems, then by reviews, real visits and how recently each app's facts were checked against its own website. Mendix currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1Mendix logoMendixFree plan + paidNoWeb, iOS, Android3 of 366.5
2Retool logoRetoolFree plan + paidNoWeb, iOS, Android +14 of 457.2
3Oracle APEX logoOracle APEXFreeNoWeb, Self-hosted0 of 049.1
  1. Mendix logo

    1. MendixTop pick

    Best for: Enterprises, especially in manufacturing, building governed apps across business and IT

    Free plan + paidWeb, iOS, Android

    66.5

    score / 100

    Why switch from OutSystems

    The closest enterprise rival, with transparent starting prices and a free tier.

    Pros

    • Mature enterprise platform with many deployment options
    • Free tier to learn and prototype
    • Strong business-IT collaboration features

    Cons

    • Paid tiers start at a high monthly cost
    • Pricing beyond the starting points needs a sales quote
    • Needs trained developers for complex apps
    Visit Mendix Details and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Mendix a good OutSystems alternative?

    Verified facts

    3 of 3 verified
    Free tier
    $0/month
    Checked Oct 25, 2026mendix.com(opens source in a new tab)
    Standard tier
    From $1,090/month
    Checked Oct 25, 2026mendix.com(opens source in a new tab)
    Premium tier
    Quote on request
    Checked Oct 25, 2026mendix.com(opens source in a new tab)
  2. Retool logo

    2. Retool

    Best for: Engineering-led teams building many internal tools on top of production databases and APIs

    Free plan + paidSelf-hostableWeb, iOS, Android, Self-hosted

    57.2

    score / 100

    Why switch from OutSystems

    Faster for developer-built internal tools without a full platform.

    Pros

    • Connects to almost any database or API
    • Large component library with SQL and JavaScript everywhere
    • Cloud, self-hosted and air-gapped deployment options

    Cons

    • Per-user pricing gets expensive as usage spreads
    • Needs developers comfortable with SQL and JavaScript
    • Closed source, so you depend on Retool's roadmap
    Visit Retool Details and reviews
    How this score is calculated
    Editorial fit ×0.369
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Retool a good OutSystems alternative?

    Verified facts

    4 of 4 verified
    Free plan
    $0 per builder
    Checked Oct 25, 2026retool.com(opens source in a new tab)
    Builder pricing
    $10 (Team) / $50 (Business) per builder/month
    Checked Oct 25, 2026retool.com(opens source in a new tab)
    Internal user pricing
    $5 (Team) / $15 (Business) per user/month
    Checked Oct 25, 2026retool.com(opens source in a new tab)
    Self-hosting
    Self-hosted or air-gapped
    Checked Oct 25, 2026retool.com(opens source in a new tab)
  3. Oracle APEX logo

    3. Oracle APEX

    Best for: Organisations already running Oracle Database that want fast internal web apps

    FreeSelf-hostableWeb, Self-hosted

    49.1

    score / 100

    Why switch from OutSystems

    Low-code on Oracle Database at no extra licence cost.

    Pros

    • No extra licence cost on top of Oracle Database
    • Apps sit next to the data for strong performance
    • Free hosted workspace for learning

    Cons

    • Tied to Oracle Database
    • Needs SQL and PL/SQL skills for serious apps
    • Default look can feel dated without theming work
    Visit Oracle APEX Details and reviews
    How this score is calculated
    Editorial fit ×0.377
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1515
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Oracle APEX a good OutSystems alternative?

    Verified facts

    0 of 0 verified

    No sourced facts yet.

The best OutSystems alternative for…

The highest-ranked app in this list for each need.

Mendix logo

Best OutSystems alternative for most people

Mendix

The closest enterprise rival, with transparent starting prices and a free tier.

Oracle APEX logo

Best OutSystems alternative for a free option

Oracle APEX

Low-code on Oracle Database at no extra licence cost.

Retool logo

Best OutSystems alternative for a free plan you can upgrade

Retool

Faster for developer-built internal tools without a full platform.

Retool logo

Best OutSystems alternative for self-hosting

Retool

Faster for developer-built internal tools without a full platform.

Microsoft Power Apps logo

Best OutSystems alternative for Windows

Microsoft Power Apps

Cheaper for Microsoft-centred organisations with simpler apps.

Mendix logo

Best OutSystems alternative for iPhone and Android

Mendix

The closest enterprise rival, with transparent starting prices and a free tier.

Superblocks logo

Best OutSystems alternative for working in the browser

Superblocks

AI-generated internal apps with enterprise governance.

OutSystems alternatives: common questions

What is the best alternative to OutSystems?

Mendix ranks first right now. The closest enterprise rival, with transparent starting prices and a free tier. Microsoft Power Apps and Retool follow it in our ranking.

Is there a free alternative to OutSystems?

Yes. Mendix (free plan + paid), Retool (free plan + paid) and Oracle APEX (free) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to OutSystems?

None of the 5 alternatives in this list is open source.

Why do people switch from OutSystems?

The complaints we hear most: quote-based pricing that is expensive for small teams; requires trained developers; significant platform lock-in.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces OutSystems, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.