Should You Go Serverless? Pros, Cons & What to Expect

Serverless computing and cloud computing are often used interchangeably, but they are not the same. In many ways, serverless unlocks the full potential of cloud computing, as resources are allocated, scaled, and paid for according to the user’s needs.  So - is it worth your time?

In serverless computing, users only focus on writing code. The cloud manages code execution, performance, and scalability. In simple terms, cloud computing refers to providing on-demand computer services over the internet and on a pay-as-you-go basis. This results in massive cost savings and greater scalability. 

As cloud adoption has grown, so has the use of serverless. The serverless computing market is projected to grow from last year’s $21.9 billion to $44.7 billion by 2029, at a Compound Annual Growth Rate (CAGR) of 15.3%. ​

With such an impact on the tech landscape, serverless architecture is surely a topic worth getting into. So let’s dive into some of the advantages, disadvantages, and how businesses can leverage these tools.

What is Serverless Computing?

Traditionally, software engineers had to maintain the infrastructure that hosted their applications. Serverless computing eliminates this requirement by providing a cloud-based execution model where developers focus only on writing code. The cloud provider manages the code execution, scalability, and infrastructure maintenance.

Serverless computing allows businesses to scale up and down automatically, reducing operational overhead. This way, developers can create applications without provisioning or managing servers, which enables faster deployment and innovation. 

It’s also a huge cost-saving measure. Businesses leveraging serverless technologies, such as AWS Lambda, have reported a 35% annual cost reduction, with significant savings in maintenance, infrastructure setup, and application development.

Other names for serverless computing are FaaS, cloud functions, event-driven computing, BaaS, and serverless microservices.

How Does Serverless Computing Work?

The serverless model operates by allowing developers to write small, event-driven functions that execute in response to specific triggers, such as HTTP requests or database changes. 

Once triggered, the cloud provider runs the function, dynamically allocating resources as needed. If another function is required within the same context, the system efficiently reuses existing resources, ensuring smooth execution. The result is then displayed to the end user, creating a seamless experience.

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Key Components of Serverless Architecture

Serverless computing is built on several key components that work together to create a seamless, scalable, and cost-efficient system. Let’s break them down.

Function as a Service (FaaS)

FaaS is the core of serverless, executing logic when triggered by an event. Cloud providers offer purpose-built FaaS solutions, like AWS Lambda, Azure Functions, Google Cloud Functions, and IBM Cloud Functions for private or hybrid environments. 

These functions interact with backend databases, processing requests and delivering responses only when needed.

Client Interface

Not all applications work with serverless, the client interface plays a major role in serverless functionality. 

The client interface must be able to support short spurts of requests, stateless interactions, and flexible integrations. whether dealing with high or low traffic loads.

Cloud Web Server

The web server is where a stateless interaction will be initiated after the user initiates it and before the FaaS service terminates it.  This server is separate from the backend database, where the information delivered to users is stored.

Think, for example, of a video streaming service where the web server manages requests and scripts, while the actual videos are stored separately and fetched when needed.

Security Service

Because of its stateless nature and distributed components, security is critical in serverless computing. Each request must be authenticated in real-time, and monitoring can be challenging due to the vast number of logged events. 

Many serverless applications use a token service, where temporary credentials are generated for users and can be used to invoke the function. You can also integrate serverless-ready identity and access management services into your application. For example, AWS Cognito works with AWS Lambda to authenticate user identity through SSO or social networks.

Backend Database

All user-relevant data—whether static content, SQL databases, or media storage—is housed in a backend database. Many developers rely on Backend as a Service (BaaS) solutions to minimize maintenance while ensuring seamless integration with FaaS.

This could range from static content repositories to SQL databases, from media storage to live broadcasting modes.

API Gateway

Acting as the bridge between the client interface and FaaS, the API gateway routes requests, triggers functions, and enables multiple integrations. It enhances serverless applications by improving connectivity and expanding functionality.

Serverless Computing vs. Cloud Computing: What’s the difference?

Both serverless and cloud computing rely on cloud infrastructure, but they differ mainly in how resources are managed and used.

Cloud computing provides on-demand access to virtual machines, storage, and services over the internet. This includes models like Infrastructure as a Service (IaaS) and Platform as a Service (PaaS), where businesses manage their applications but still deal with server maintenance, scaling, and uptime.

The key difference with serverless computing is that cloud computing gives businesses more control over their infrastructure, while serverless offers complete abstraction, allowing developers to focus solely on code. 

Advantages of Serverless Computing

• Cost Efficiency: Businesses pay only for actual resource usage, avoiding expenses related to idle servers.
• Scalability: Serverless platforms scale automatically based on demand, ensuring optimal performance.
• Faster Deployment: Developers can deploy and update applications quickly without dealing with infrastructure.
• Resource Optimization: Companies do not need to maintain high-capacity servers for occasional use.

Disadvantages of Serverless Computing

• Cold Starts: The first user request may experience latency due to cold-start initialization.
• Debugging Challenges: Debugging and monitoring can be complex as applications are not hosted on local servers.
• Vendor Lock-in: Limited interoperability can make migrating applications to a different provider difficult.

Advantages of Cloud Computing

• Easy Migration: Businesses can move applications to the cloud without handling technical complexities.
• Flexible Growth: Companies can scale resources up or down based on demand.
• Remote Accessibility: Users can access applications and infrastructure from anywhere.
• Hardware Savings: Eliminates the need for physical servers, reducing capital expenditures.

Disadvantages of Cloud Computing

• Security Risks: Ensuring data security requires choosing a reputable cloud provider.
• Ongoing Costs: Cloud services can become expensive over time.
• Not Always Serverless: Some cloud models still require businesses to manage their own servers.
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Serverless Computing vs. Cloud Computing: Which One is Better?

While cloud computing today is the more popular choice and individuals, serverless computing is the future; Lower costs, a high level of automation, and efficient allocation. Serverless computing is the ideal choice for anyone looking to build high-demand applications and enterprise solutions. 

That being said, if you plan to use the cloud for your personal use, more steady workloads or have limited resources, then cloud computing might right for you. Cloud computing offers free-tier options, making it accessible for individuals. It’s also especially useful for businesses that require dedicated infrastructure.

Serverless Architecture Tools

The right tools can simplify the switch to serverless for anyone and ensure that your applications perform well for users. Here are some of our top picks:

• Serverless Deployment Frameworks: AWS Serverless Application Model (SAM) and  Serverless Framework both interact with the cloud provider’s platform via an API and allow you to define your functions, triggers, and permissions.
• Security Tools: AWS Cognito for authentication, serverless security scanners.
• Monitoring Solutions: Datadog Serverless Monitoring provides real-time performance insights.

Serverless functions typically travel through a complex web of microservices, and cold starts, misconfigurations, and other errors can occur at any node and cause ripple effects throughout your environment, so make sure to keep everything in check. 

Conclusion

Serverless computing has a wide array of applications and advantages if you know what you’re doing. 

For businesses aiming for scalability, cost efficiency, and rapid deployment, serverless is a game-changer—especially in high-demand environments. However, if your organization requires greater control over infrastructure or steady workloads, traditional cloud computing might be the better fit.

As the serverless computing market continues to grow, it’s clear that this technology is shaping the future of software development. So don’t wait to look into the resources that may be available to you.