$10,000+
$50 - $99 / hr
10 - 49
SMBs
Poland, Kraków
2017
Within 1 month
Accelerating Digital Commerce

Upside is a full-stack digital agency specialising in digital commerce. We work with market challengers to successfully improve and scale their digital platforms and customer experiences.

Our areas of expertise:
- Headless e-Commerce Development
- International e-Commerce Development
- Vue Storefront Development/PWA
- Headless Marketplace Development
- Multi-Tenant e-Commerce Development
- Custom Integrations

We work with some of the best-known brands in the world (including Samsung and T-Mobile) as well as disruptive startups (like Deltabager and Yoonema).

The solutions we choose are battle-tested and reliable, but we’re also experts when it comes to finding new custom ideas. We are Spree Commerce maintainers, which means we provide the best support for projects developed on this platform.

Some of the technologies we use:
Ruby, Rails, Python, Django, Node.js, JavaScript, Vue.js, React.js and React Native.

Accelerating Digital Commerce

Techreviewer rating

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5.0

Client review platforms

The company's reputation is reflected through ratings and reviews from different review websites:

5.0
(10 reviews)Clutch
5.0
(14 reviews)Google

AI Overview

Powered bytechreviewer AI
This company performance overview is based on AI analysis of 10 client reviews across 1 review platform. Read more about our methodology.
Last updated: April 2026

Performance snapshot

Upside presents a consistently strong performance profile across all 10 reviews, drawn exclusively from a single platform spanning 2018 to 2023. The vendor demonstrates particular strength in web and custom software development, with recurring praise for communication transparency, on-time and under-budget delivery, and responsive collaboration. No negative mentions or sub-4.0 sub-metric ratings appear across the dataset, though the anchor reviews lack sufficient high-density metrics to elevate all categories to a fully anchored Strong rating.

Performance breakdown

Technical expertise
Strong

Upside demonstrates breadth across full-stack development, cloud migration, API integrations, Spree Commerce, Webflow, Figma, and agile methodology. Multiple clients cite high-quality outputs including CRM integrations, e-commerce builds, and MVP delivery across diverse industry contexts.

Project management & delivery
Strong

Across multiple engagements, Upside is explicitly noted for delivering on time and within budget, including under tight deadlines. Agile methodology adoption and daily status updates via Slack are cited as structural contributors to consistent milestone adherence.

Communication & collaboration
Strong

Communication is the most consistently praised attribute across the dataset. Clients highlight daily Slack updates, video calls, rapid feedback responsiveness, and a transparent development process as hallmarks of Upside's collaborative style across time zones.

Reliability
Strong

Reviewers report stable, production-ready deliverables, including a site sustaining 150,000 annual visitors and an e-commerce platform with continued traffic growth. No bug-related complaints or delivery failures are mentioned across any reviewed engagement.

Client satisfaction & outcomes
Strong

Tangible outcomes include high CTRs and low bounce rates at launch, significant productivity gains in form submission accuracy, 150,000 site visitors in one year, and continued client re-engagement across multiple projects, reflecting strong ROI and satisfaction signals.

Best for

Upside is best suited for startups, SMEs, and mid-market companies seeking full-stack web development, e-commerce platforms, and custom software integrations, particularly where strong communication cadence and budget discipline are priorities.

Clients info

Upside's client base spans retail, education, media, and digital product sectors, primarily serving small to mid-sized companies. Project budgets typically fall in the $10,000–$49,999 range, with select engagements reaching $50,000–$199,999 for larger platform builds. Primary industries represented include Retail, Education, Media, Digital Products / SaaS. Typical client size bands include 1-10 Employees, 11-50 Employees, 201-500 Employees. Common project budget ranges include $10,000 to $49,999, $50,000 to $199,999.

Review strength

The assessment is based on 10 reviews sourced from a single platform, spanning November 2018 to March 2023. The most recent review dates to March 2023, which is over one year old. The absence of multi-platform validation limits benchmark confidence despite review volume. Review date range: Nov 13, 2018 - Mar 8, 2023.

Performance breakdown

Technical expertise
Strong

Upside demonstrates breadth across full-stack development, cloud migration, API integrations, Spree Commerce, Webflow, Figma, and agile methodology. Multiple clients cite high-quality outputs including CRM integrations, e-commerce builds, and MVP delivery across diverse industry contexts.

Project management & delivery
Strong

Across multiple engagements, Upside is explicitly noted for delivering on time and within budget, including under tight deadlines. Agile methodology adoption and daily status updates via Slack are cited as structural contributors to consistent milestone adherence.

Communication & collaboration
Strong

Communication is the most consistently praised attribute across the dataset. Clients highlight daily Slack updates, video calls, rapid feedback responsiveness, and a transparent development process as hallmarks of Upside's collaborative style across time zones.

Reliability
Strong

Reviewers report stable, production-ready deliverables, including a site sustaining 150,000 annual visitors and an e-commerce platform with continued traffic growth. No bug-related complaints or delivery failures are mentioned across any reviewed engagement.

Client satisfaction & outcomes
Strong

Tangible outcomes include high CTRs and low bounce rates at launch, significant productivity gains in form submission accuracy, 150,000 site visitors in one year, and continued client re-engagement across multiple projects, reflecting strong ROI and satisfaction signals.

Location and contacts

Poland, Kraków
Krupnicza 5/6
31-123
+491709502716
Germany, Berlin
Rheinsberger Str. 76/77
10115
+491709502716

Major clients

Samsung
T-Mobile
Yoonema
Deltabadger
Mineski
Winderen