# Best Internet of Things (IoT) Developers in Greater London, England

## How Many Internet of Things (IoT) Developers Products Does G2 Track?

**Total Products under this Category:** 200

### Category Stats (Aug 2026)

- **Average Rating:** 4.63/5 The average rating of products in this category, based on all submitted ratings

_Last updated: August 05, 2026_

## How Does G2 Rank Internet of Things (IoT) Developers Products?

**Why You Can Trust G2's Software Rankings:**

- 30 Analysts and Data Experts
- 500+ Authentic Reviews
- 200+ Products
- Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

## G2 Grid® for Internet of Things (IoT) Developers
 ![G2 Grid® for Internet of Things (IoT) Developers plotting products by satisfaction and market presence](https://www.g2.com/categories/internet-of-things-iot-developers/grids.png?focus%5B%5D=169874&focus%5B%5D=23031&focus%5B%5D=69999)

Highlighted products: Teravision Technologies, Algoworks, and Mercury Development.

Underlying data: [Grid® JSON](https://www.g2.com/categories/internet-of-things-iot-developers/grids.json?focus%5B%5D=teravision-technologies&focus%5B%5D=algoworks&focus%5B%5D=mercury-development)

**Sponsored**

### Designli

Designli helps non-technical founders turn software into real, revenue-generating businesses.  Most agencies hand over code and walk away, leaving you to build the business yourself. We work differently, measuring our success by your traction - real users on a live product and real signs that the business is growing.  Every engagement is built around a guaranteed outcome:  For founders starting from scratch, our TractionLab program puts a real user on a working Version 1 within 30 days, or your next month is free. From there, the whole team works to turn that first user into many, and early usage into real revenue. For founders who already have something live, we start with a free one-week Impact Week that pinpoints exactly what's holding your product back. You walk away with a customized plan and a guaranteed Day-30 outcome that clears those roadblocks, so you can get back to chasing traction and your vision instead of fighting your product.   The burden is on us to prove we're the right partner. Picking a software development agency is one of the most important decisions you'll make as a founder, and we don't think that risk should fall entirely on you. That's why your first 14 days are fully refundable, and you can cancel any time with 30 days' notice. We work using Hypothesis-Driven Development. Building software is cheaper than ever with AI-empowered engineers; the hard part is knowing what to build and whether it worked. So every change we make carries a business metric and a clear bet about what it should move, and we measure whether it actually did. The result is a real feedback loop on whether your product is getting better each week and driving more usage and revenue. Each engagement is staffed with a small, senior pod that gives your product full-time focus and founder-level care, and is paid on outcomes, not promises. Learn more at https://designli.co

[Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=ppc&secure%5Bad_slot%5D=category_product_list_llm&secure%5Bcategory_id%5D=1054&secure%5Bchosen_at%5D=2026-08-12T13%3A55%3A35Z&secure%5Bdisplayable_resource_id%5D=1052&secure%5Bdisplayable_resource_type%5D=Category&secure%5Bmedium%5D=sponsored&secure%5Bplacement_reason%5D=neighbor_category&secure%5Bplacement_resource_ids%5D%5B%5D=1053&secure%5Bplacement_resource_ids%5D%5B%5D=1055&secure%5Bplacement_resource_ids%5D%5B%5D=1052&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=28228&secure%5Bresource_id%5D=1054&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Finternet-of-things-iot-developers%2Flocations%2Fgreater-london-england-gb&secure%5Btoken%5D=69c2844d2d8b4a4c47bde4df9c687e048861e787b3c1372add4c8b8a329543ac&secure%5Burl%5D=https%3A%2F%2Fdesignli.co%2F%3Futm_source%3DG2%26utm_medium%3Dpaid%26utm_campaign%3Dg2paidads&secure%5Burl_type%5D=custom_url)

### [Appinventiv](https://www.g2.com/products/appinventiv/reviews)

Appinventiv is an award-winning organization providing impeccable technology solutions to startups and Fortune 500 companies. The company which started its journey back in 2015, today stands strong at 650+ tech experts, engineers and professionals striving towards bridging the gaps between client ideas and reality. The sole aim is to facilitate a rich customer experience and smarter, innovative solutions through on-time delivery and post-development support. They have so far delivered 1000+ projects successfully. The company has on-board disruptive technologies such as Blockchain, Artificial Intelligence, Machine Learning, Internet of Things, among others. Their client list constitutes several recognizable names like Dominos, KPMG, IKEA, Karvan, Gully Beat and many more. This ever enthusiastic startup is challenging boundaries to bring more opportunities in every sector, be it Healthcare, Banking & Finance, Real Estate and Entertainment.

**Average Rating:** 3.5/5.0

**Total Reviews:** 1

#### Who Is the Company Behind Appinventiv?

- **Seller:** [Appinventiv](https://www.g2.com/sellers/appinventiv)
- **Year Founded:** 2015
- **HQ Location:** Noida, IN
- **Twitter:** @Appinventiv  
7,359 Twitter followers
- **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=66df000f097b5e2ed644f0cc906e0a660473a166b35a911db192d6087f76e5a9&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fappinventiv%2F&secure%5Burl_type%5D=linkedin_company_website)  
1,384 employees on LinkedIn®

#### Who Uses This Product?

- **Company Size:** 100% Medium

#### What Are G2 Users Discussing About Appinventiv?

- [What is Appinventiv used for?](https://www.g2.com/discussions/what-is-appinventiv-used-for) - 1 comment

### [Lemberg Solutions](https://www.g2.com/products/lemberg-solutions/reviews)

We help to plan, design and build amazing digital products and our portfolio showcases it in the best way.

#### Who Is the Company Behind Lemberg Solutions?

- **Seller:** [Lemberg Solutions](https://www.g2.com/sellers/lemberg-solutions)
- **Year Founded:** 2007
- **HQ Location:** Lviv, UA
- **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=8fd36e68b61f4d73917957f322e8824fed55fe34464199bbb42e987f81995cde&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Flemberg-solutions-limited&secure%5Burl_type%5D=linkedin_company_website)  
203 employees on LinkedIn®

### [One Beyond](https://www.g2.com/products/one-beyond/reviews)

One Beyond is a multi-award winning bespoke software development company, with Headquarters in Farnborough, Hampshire, and engineering centres of excellence in London, Manchester, Madrid, Seville, Bucharest, Budapest and Szeged. Since 1994, we’ve created intelligent, cost-effective and intuitive web applications, desktop applications and mobile apps for established businesses, non-profits, government organisations and funded start-ups. We have a team of over 300 across our international business. One Beyond delivers large scale digital transformation, team augmentation, delivery of discrete Agile projects and world class bespoke software using complementary tech including, but not limited to, Microsoft .NET, Power BI, React and Node.js. The company’s capabilities also include DevOps proficiency and deployment on Azure and AWS. Accredited with Microsoft Gold Partner status, as well as ISO 9001 & ISO 27001, the firm’s highly competitive services are leveraged through an optimal blend of international delivery centres either UK-based or nearshore, all operating under One Beyond’s best practice methodology and with a partnership approach, to generate consistent and superior quality products and services.

#### Who Is the Company Behind One Beyond?

- **Seller:** [One Beyond](https://www.g2.com/sellers/one-beyond)
- **Year Founded:** 1994
- **HQ Location:** Farnborough, GB
- **Twitter:** @OneBeyond\_  
78 Twitter followers
- **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=1a8adee66c2fa69a853ea196542f25f71b07876a7dde1e876c37b412270f05cf&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fonebeyond&secure%5Burl_type%5D=linkedin_company_website)  
211 employees on LinkedIn®

### [Smartym Pro](https://www.g2.com/products/smartym-pro/reviews)

Smartum Pro is a full-cycle development company specialized in enterprise web and mobile application development.

#### Who Is the Company Behind Smartym Pro?

- **Seller:** [Smartym Pro](https://www.g2.com/sellers/smartym-pro-6bc2dad1-681f-4338-b8a8-942afd4ba9b1)
- **Year Founded:** 2012
- **HQ Location:** Warsaw, PL
- **Twitter:** @Smartum\_Pro  
760 Twitter followers
- **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=86bbe715b0d63f65d2ca05c89c69f52745a5fcd9d6f9409b3094a4f6ab9fa770&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fsmartym-pro%2F&secure%5Burl_type%5D=linkedin_company_website)  
21 employees on LinkedIn®

### [Tapptitude](https://www.g2.com/products/tapptitude/reviews)

Tapptitude is a Product Studio that partners with funded startups and established brands to build interactive, mobile-first digital products that people love to use. We work with our clients as Product Partners, supporting them proactively throughout the journey from idea to launching a product and scaling it up. Startups and brands work with us to define their product, design their prototype, develop and iterate their MVP in order to create a successful business. Our process stands out through our early focus on value and close partnerships. We work on each product to identify and create easy acquisition flows, generate value early to retain users, and build a solid infrastructure for scalability. Our workflows are based on lean principles, rapid prototyping techniques and agile development, making us very fast and flexible in iterating value to users. Our solutions for startups: • Product definition • Rapid prototyping • MVP development Our solutions for larger organisations: • Design sprints • UX research and persona design • Evidence-based growth plan Our technical team delivers full-stack implementation solutions, to build Native and React Native products for iOS, Android, Wearable Devices and the Web. Our services include: • Product strategy and definition • UX/UI design • Native and cross-platform Mobile Development • Web & Backend Development • DevOps • AI, Machine learning and Data Science • Manual & Automated QA • Product launch solutions • Product growth We’ve built products for industries like: • IoT • Health • Proptech • Fintech • Marketplaces and retail • Social platforms • Arts, entertainment and culture

**Average Rating:** 4.9/5.0

**Total Reviews:** 31

#### Who Is the Company Behind Tapptitude?

- **Seller:** [Tapptitude](https://www.g2.com/sellers/tapptitude)
- **Year Founded:** 2013
- **HQ Location:** Cluj-Napoca, Cluj
- **Twitter:** @Tapptitude  
303 Twitter followers
- **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=90f727f1577e15abd378d40c9f277a7a04239a1081ef25ca0dd737dacd475a1f&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Ftapptitude&secure%5Burl_type%5D=linkedin_company_website)  
34 employees on LinkedIn®

#### Who Uses This Product?

- **Company Size:** 74% Small, 23% Medium

#### What Do G2 Reviewers Say About Tapptitude?

_AI-generated summary from verified user reviews_

##### Pros

- Users commend Tapptitude for their **high professionalism** , enjoying their knowledgeable and responsive team in the development process.
- Users value Tapptitude's **strong execution and collaborative spirit** , resulting in a smooth and effective development process.
- Users commend the **quality of execution** from Tapptitude, ensuring reliable and timely project development experiences.
- Users value the **fast response times** from Tapptitude, ensuring efficient communication and project management.
- Users value Tapptitude's **commitment to collaboration and responsiveness** , enhancing the development process and fostering teamwork.

##### Cons

- Users face **communication issues** that can lead to misunderstandings and challenges, especially with language barriers involved.
- Users face **lack of communication** that complicates collaboration and creates misunderstandings, particularly due to language barriers.
- Users experience **project delays** due to communication challenges and timeline adherence, impacting overall satisfaction with Tapptitude.
- Users find **timezone differences challenging** , but Tapptitude's round-the-clock availability helps mitigate the issue.
- Users find **time zone issues** challenging, yet appreciate Tapptitude’s round-the-clock availability for support.

#### What Are Recent G2 Reviews of Tapptitude?

**["Exceptional Service during and after the project + very Fast Support"](https://www.g2.com/survey_responses/tapptitude-review-12179679)**

**Rating:** 5.0/5.0 stars

_— findmyfitbuddy o._

[Read full review](https://www.g2.com/survey_responses/tapptitude-review-12179679)

**["Tapptitude Professionals Delivered a Fantastic Solution"](https://www.g2.com/survey_responses/tapptitude-review-12710541)**

**Rating:** 5.0/5.0 stars

_— Tudor Draghiciu D._

[Read full review](https://www.g2.com/survey_responses/tapptitude-review-12710541)

### [ustwo studio](https://www.g2.com/products/ustwo-studio/reviews)

We champion unrivalled user experience design and best-in-class technical practices, but we recognise that product is so much more than either of these in isolation.

#### Who Is the Company Behind ustwo studio?

- **Seller:** [ustwo fampany ltd](https://www.g2.com/sellers/ustwo-fampany-ltd)
- **Year Founded:** 2004
- **HQ Location:** London, GB
- **Twitter:** @ustwo  
23,567 Twitter followers
- **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=d8a5a051f2616d5f4ce2a06261bd7a68c933b83dd6e2ce80226bfba4122491ea&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fustwo-&secure%5Burl_type%5D=linkedin_company_website)  
142 employees on LinkedIn®

### [Vakoms](https://www.g2.com/products/vakoms/reviews)

Your reliable IT partner to build a product from scratch or refine your business

#### Who Is the Company Behind Vakoms?

- **Seller:** [Vakoms](https://www.g2.com/sellers/vakoms)
- **Year Founded:** 2010
- **HQ Location:** Wrocław, PL
- **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=eb6880b36f975349d20029adb09c9a184c496892717a8463f45f376793d41df7&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fvakoms&secure%5Burl_type%5D=linkedin_company_website)  
76 employees on LinkedIn®

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 ![Adam Crivello](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Adam Crivello")
AC

Researched and written by [Adam Crivello](https://research.g2.com/insights/author/adam-crivello)

Updated October 3, 2024

The internet of things (IoT) is a term used to describe the growing network of appliances, homes, and various “smart objects" that communicate with each other to automate and optimize performance. These smart devices generate analytics based on environment and usage habits, and in many cases learn to adjust functionality and perform key tasks without manual commands. IoT developers design and build new smart devices as well as the mobile applications that act as central hubs for a user’s interconnected objects. Businesses can work with IoT development firms to add IoT functionality to their workplaces and build custom smart objects to suit the companies’ needs.

A number of [mobile app development firms](https://www.g2.com/categories/mobile-app-development) are expanding to offer IoT development services to meet the increasing demand and popularity of smart devices. [IoT management software](https://www.g2.com/categories/iot-management) helps both users and developers sync, control, and monitor smart devices in a local network.

Show More