In 2025, ordering food through an app is not a prototype, but a highly competitive industry where the winner is someone who offers not just an interface, but a complete operating system. The success of the service is determined not by the number of animations, but by how seamlessly it is integrated into the «guts» of the restaurant: its management system (POS) and financial flows. The problem of order timing, manual data entry and payment delays is killing profitability. We analyzed the market and selected companies that understand this pain at the level of solution architecture. In the focus – real expertise in integrations with popular POS (like Poster, iiko, R-Keeper) and payment integration of gateways.
The rating is built on the principle of «from good to best», where the leader is a narrow specialist who resolves the key problem of the industry.
7. Appinventiv
Profile: A large outsourcing development with strong marketing and broad portfolio.
Deep expertise in integrations: Appinventiv positions itself as a reliable partner for creating working “out of the box” solutions based on proven industry templates. Their strength is the scale and experience of projects for different geographic markets with their specific requirements. The company demonstrates a strong API proficiency of all major payment gateways (Stripe, Braintree, Adyen) and has proven experience in integrating with popular enterprise-level POS systems.
However, their approach remains within the framework of universal development. They offer a stable and predictable integration, but without deep customization to the unique business logic of the specific restaurant chain. This is expressed in the use of standard data exchange protocols without optimization to the features of kitchen operation during peak hours or specific rules of application of discounts. For many projects in the start-up phase, this is sufficient, but for those who are building a unique operational model, it may not be enough.
Technology stack and approach: Work on flexible methodologies (Agile/Scrum), use modern stack: React Native/Flutter for cross-platform development or native technologies for iOS/Android. Backend is most commonly based on Node.js or Python. AWS and Google Cloud solutions are heavily used for scalable infrastructure.
For whom: The ideal choice for startups and well-known brands entering the delivery market, who need a quality, predictable and relatively fast in the implementation of the product without exotic requirements at the first stage.
6. Sumatosoft
Profile: A technically sophisticated team with a pronounced slope to solving complex backend problems and developing the API.
Deep expertise in integrations: Sumatosoft stands out from other studios by its ability to work not with abstract tasks, but with specific technical challenges in the field of financial logistics. Their profile is projects that require the implementation of non-standard payment models: split payments (split payments) between cloud cuisine, partner restaurant and platform, complex multi-level loyalty systems with automatic application of bonuses at POS-levelsystem, integration with local and regional payment providers that have specific APIs.
Their approach to integration with POS systems is fundamental. They are not limited to standard documentation, preferring a deep dive into the partner system architecture, which allows them to find non-obvious ways to optimize data exchange, reduce delays and improve the reliability of synchronization of leftovers and menus.
Technology stack and approach: Rely on reliability and database performance: Python/Django, Ruby on Rails, Elixir/Phoenix. For frontend use the classic React or Vue.js. Special attention is given to API design and documentation (often using OpenAPI), which is critical for long-term support and project scaling.
For: Technical founders, CTO and product managers who value the quality of architecture and code cleanliness above initial market entry speed and have a complex, unique business logic in the area of payments and settlements.
5. Iflexion
Profile: Veteran of the enterprise solutions market with twenty years of experience, a huge team and portfolio of large clients.
Deep expertise in integrations: Iflexion is synonymous with thoroughness, security and predictability for large and complex projects. Their core competence is working in highly regulated environments and with legacy infrastructure. If your project involves handling huge amounts of data, adhering to the strictest security standards (PCI DSS, GDPR) and, most importantly, integrating with old but critical POS systems that have been working in large networks for decades, they are one of the best candidates.
Their development process is neither fast nor cheap, but it minimizes the risks. They carry out in-depth audits of existing systems, develop detailed integration plans and ensure that the system runs smoothly even when one of the nodes is partially unavailable. For them, failover and seamless transaction processing is the number one priority.
Technology stack and approach: Work with a complete cycle: from consulting and design to deployment and support. Use proven enterprise technologies: Java Spring, . NET Core, Oracle DB. Actively use microservices architecture to isolate risks and ensure scalability of individual modules, such as payment gateway or notification service.
For whom: Large restaurant chains, international franchises and corporate clients for whom stability, security and compliance are not negotiable and are the foundation of the business.
4. Inoxoft
Profile: A company with strong expertise in creating flawless user experience (UI/UX) and mobile development.
Deep expertise in integrations: Inoxoft is based on the principle that even the most perfect and technological integration is useless if it is uncomfortable or impossible to use. Their key advantage is the ability to “package” complex data and functions coming from POS systems (complex food modifiers, dynamic cooking time, real-time balances) and payment gateways into intuitive, responsive and fast interfaces.
They conduct a deep UX research of all the roles in the system: the client who must order food for three clicks, the courier who needs the most clear and convenient map with the route, and the restaurant administrator, who should see the status of dozens of orders without having to switch between programs. Their integration with payment systems is always aimed at maximum conversion: it’s one-step payment, convenient card storage, smart application of promo codes and subscriptions.
Technology stack and approach: Strong in mobile development: Kotlin for Android, Swift for iOS, as well as cross-platform solutions on Flutter. React is used for web interfaces. The development process is closely linked to design and usability testing cycles with real users.
For whom: Projects where the main competitive advantage is not unique functionality, but excellent user experience that increases loyalty and conversion.
3. SolveIt
Profile: Developer with strong inclination in the creation of white-label and marketing platforms.
What about integrations? SolveIt thinks about categories of platforms. Their specialization is to create not just an application for a single restaurant, but an aggregator or SaaS solution for multiple establishments. Accordingly, their approach to integrations is systemic: they develop flexible admin panels where the platform owner can centrally manage the connection of new restaurants, their POS systems and configure rules of commissions. Their boxed solutions support multi POS and multi payment providers, which is a must-have for any aggregator. They build an ecosystem, not a point product.
For whom: Creators of delivery aggregators, SaaS platforms for restaurants and networks planning to launch their own delivery service.
2. JetRuby
Profile: Developer focused on creating complex platform solutions: white-label products, marketing tools and SaaS.
Deep expertise in integrations: SolveIt does not think of individual applications, but of whole ecosystems. They specialize in creating platforms that must simultaneously serve tens or hundreds of restaurants, each with its own set of connected services. Therefore, their approach to integrations is fundamentally systemic.
They develop not just a point of connection to one payment provider or POS system, but complex adapters and control panels that allow the platform owner to centrally manage multiple connections. The administrator can connect a new restaurant through a single interface, select from the list of its POS system (iiko, Poster, Oracle), configure menu and balance synchronization rules, and then connect the desired payment gateway and set for this restaurant an individual commission size. Their solutions out of the box are multi-tenant (multi-tenant) and support work with multiple providers simultaneously.
Tech stack and approach: Use a stack that is ideal for high-load platforms: Go (Golang) or Java backend, Redis caching, RabbitMQ/Kafka message queues. Databases – PostgreSQL or MongoDB. The architecture is strictly microservice, which allows you to independently scale the payment module, the geolocation module or the notification module.
For whom: The creators of delivery aggregators (Delivery Club analogues), SaaS platforms for restaurant businesses and large networks planning to launch their own delivery ecosystem with the involvement of external establishments.
1. Celadonsoft
Profile: Specialized expert in fintech and foodtech solutions development.
Why do they come first? While other companies add integrations, Celadon thinks about them. This is their main specialization and key competitive advantage. They have the deepest, almost engineering, understanding of how data exchange protocols work between POS systems, kitchen equipment (KDS) and payment providers.
- Deep expertise in POS: They don’t just use the standard iiko API or Poster. They know the pitfalls, the features of offline-mode operation and are able to configure bilateral synchronization so that the update of balances or prices occurs almost in real time without data loss. Their developers have experience working directly with the vendors of these systems.
- Payments as part of core logic: For them, the payment gateway is not just a way to accept money. They build complex schemes: hold funds, instant payments to restaurants, splitting between several recipients (restaurant, platform, courier), integration with loyalty systems and cashback, which are directly linked to the data from the check.
- Focus on operational efficiency: Their solutions automate precisely those routine operations that take time from restaurant managers: checking closed shifts, automating reports for accounting, managing returns.
In 2025, when the market is saturated, the winner is one who offers not just «another application», but a solution that reduces operating costs and eliminates friction. Celadonsoft is such a partner. They speak the same language as restaurant operations managers and technologists because they are themselves immersed in this environment.
For whom: Restaurant chain owners, creators of food-marketing and delivery services, for which continuous and deep synchronization with the internal processes of establishments is critical to business.
Review
| measure | Appinventiv | Sumatosoft | Iflexion | Inoxoft | SolveIt & JetRuby | Celadonsoft |
| specialty | Large outsourcing, strong marketing. Factory of reliable “box” solutions. | Technically sophisticated team, adept complex backend and API. | Veteran of the enterprise market. A synonym for thoroughness and security. | Experts in flawless UI/UX and mobile development. | Creators of white-label SaaS and ecosystems, not point products. | Specialized expert in fintech and fudge. Integrations are their core, not a supplement. |
| Essence of integrations | Reliability and predictability. Deep expertise in the integration of all major providers (Stripe, Adyen) and popular POS. Everything works “out of the box”, according to verified templates. | Solving non-standard tasks. Specialization in complex financial logic: split payments, multi-level loyalty systems, integration with regional providers. | Work with legacy and compliance. Ideal for integration with old but critical POS in regulated environments (PCI DSS, GDPR). The priority is fault tolerance and continuity. | Packaging” complexity into simplicity. Creating intuitive interfaces over complex data from POS and payment systems. Focus on conversion and usability. | System approach, not point. Development of adapters and admins to manage multiple restaurants, POS and providers from a single center. | Engineering depth. Not just use API POS (iiko, Poster), but understand them from within: offline mode, two-way synchronization without losses. The payment gateway is part of business logic, not just receiving money. |
| technology stack | Modern and predictable: React Native/Flutter, Node.js/Python, AWS/GCP. | Reliability and performance: Python/Django, Ruby on Rails, Elixir. Special attention to API quality (OpenAPI). | Enterprise-stacks: Java Spring, . NET Core, Oracle DB. Strict microservice architecture. | Mobile expertise: Kotlin, Swift, Flutter. React for web. The process is closely related to UX research. | For high loads: Go (Golang), Java, Redis, RabbitMQ/Kafka, PostgreSQL/MongoDB. | Pragmatic and efficient. Tailored to a specific task, with emphasis on stability and speed of transaction processing. |
| process | Flexible methodologies (Agile/Scrum). Predictable results within a specified time frame. | Deep dive into the problem, elaborate architecture. | Complete cycle, thorough audit, detailed planning. Risk minimization. | Iterative development, closely tied to design cycles and usability tests. | Strict microservice architecture for independent module scaling. | Dive into the business logic of the customer. Speak the same language with technologists and operational managers of restaurants. |
| Perfect customer | Startups and well-known brands coming to the market. You need a quality, predictable product quickly and without exoticism. | CTO and Technologists who value the quality of architecture and cleanliness of code above the speed of market entry. | Large networks and international franchises, for which stability and security are not the subject of negotiation, but the basis of business. | Projects where the main trump card is not unique functionality, but a flawless user experience that enhances conversion. | Creators of aggregators, SaaS platforms for restaurants. | Network owners and service creators, for whom deep synchronization with the internal processes of establishments is critical to business. |
Conclusion
The choice of the developer in 2025 is not a choice of technology, but a choice of business partner who deeply understands the operating kitchen of the restaurant business from within. As we can see, each company in the selection has its own unique profile. Appinventiv offers reliable and proven template solutions for quick start. Sumatosoft handles non-standard payment schemes brilliantly thanks to its clean code architecture. Iflexion is the choice for enterprise clients where reliability and security are paramount.
Inoxoft focuses on flawless user experience, packaging complex functions into intuitive interfaces. SolveIt is ideal for creating platforms and aggregators due to its systematic white-label approach. JetRuby looks to the future, using data from POS and payment systems to implement AI solutions that optimize business processes.
And finally, the leader – Celadonsoft – demonstrates a highly specialized approach where the integration of POS and payment systems is not just a function but the core of the product. Their expertise enables the creation of solutions that not only connect systems, but completely eliminate operational friction, which becomes a key competitive advantage in 2025.
The main trend is to move from simple connections to creating a single data ecosystem where application, POS and payments work as one coherent mechanism. Your task is to find the partner whose expertise best matches your specific business challenges.