Ranked · 11 of 13 assessed
Ordered by Agency List ScoreAI and spatial computing for aviation and healthcare industries
Mobile and web app development across London, Bournemouth, and Chicago studios
AI development and custom software for diverse industries
Custom software and mobile app development since 2009
App development and UI/UX design for non-technical founders
Web and mobile app development with strategic digital marketing
Websites, branding, and custom software for startups and established businesses
Analytics and web services for inbound lead capture and search visibility
Offshore software development with web, mobile, and custom solutions
Custom mobile apps, IoT solutions, and beacon technology built through Agile development
Also in Illinois · 4 not ranked here
2 have not yet been assessed on the Agency List Score. Alphabetical.About this ranking
What this page ranks
This page ranks 11 of the 13 assessed mobile app development agencies in Illinois, United States — the ones carrying a published score — out of 15 listed.
The score measures how well an agency documents its own work in public — named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than described as the client's own results. It does not measure client satisfaction, price, or availability.
Cohorts and awards
Agencies are compared within a cohort — here, Mobile App Development in Illinois, United States. A cohort must be large enough to express the band being awarded: at least 8 assessed agencies for a top 25% award, 20 for top 10%, 40 for top 5%, and 300 for top 1%. This one holds 13, so the strongest award available here is top 25%.
The 2 mobile app development agencies not yet assessed are listed on this page but not ranked.
A further 2 were assessed and no published evidence of their work was found, so no score is shown for them.
Paid placement
Partner agencies can buy a labelled placement block above the ranking on this page. It is always marked as paid and is never mixed into the ranked list.
Placement is paid; it does not affect the ranking, cohort membership, or any agency's score. Ranking position, cohort membership and the score itself are not for sale.
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Questions
- How many mobile app development agencies are in Illinois, United States?
- 15 are listed on Agency List in Illinois, United States. 13 of them have been assessed on the Agency List Score as of October 2026, and 11 of those carry a published score.
- Which mobile app development agency in Illinois, United States is ranked highest?
- Lextech, with an Agency List Score of 96.8, ranks #1 of 13 assessed agencies in Mobile App Development in Illinois, United States.
- Why are 4 mobile app development agencies listed here but not ranked?
- 2 of the 15 listed have not yet been assessed on the Agency List Score. A further 2 were assessed and no published evidence of their work was found, so no score is shown for them. They each have a profile and are listed below the ranking, alphabetically, rather than being hidden or mixed into it.
- How is the ranking determined?
- By Agency List Score, within the Mobile App Development in Illinois, United States cohort of 13 assessed agencies. The score is computed from evidence published on each agency's own website: named clients, quantified outcomes, and whether the outcome is attributed to the agency. Paid placement does not affect it.