Serverless computing architectures remain a nascent and misunderstood form of tapping into cloud resources. In fact, a recent survey from cloud services provider DigitalOcean found that half of developers did not have a strong understanding of serverless. But, of those, a vast majority said they plan to research the topic within the next 12 months.

That research is likely to begin with the traditional cloud providers that have so far championed the serverless space. Amazon Web Services (AWS) remains the dominate platform provider with its Lambda service, though Google Cloud Functions and Microsoft Azure Functions are beginning to gain traction.

There are also a growing number of smaller players quickly filling in the support gap. Here are five of those companies you may not have heard of from different sectors of the serverless ecosystem making their mark.

Galactic Fog offers its Gestalt platform that provides a control plane to help organizations adopt, build, deploy, and manage cross-cloud, enterprise function-as-a-service (FaaS), cloud-as-a-service (CaaS), and future cloud technologies. It ties into the AWS Lambda ecosystem and runs on top of CaaS platforms like Kubernetes and Mesos DC/OS.

The company’s platform is built on open source, but according to the Cloud Native Computing Foundation (CNCF) the platform license is not open source. The Newark, New Jersey-based company raised $2.5 million in a pair of funding rounds.

Seattle-based Algorithmia provides a hosted serverless platform that powers a public marketplace for algorithms targeted at DevOps for artificial intelligence (AI) and machine learning. It counts more than 60,000 developers and 4,500 algorithms.

Its Serverless AI Layer allows organizations to set up models in the cloud. Users can quickly access code from the marketplace needed to scale to their data and usage needs. Developers can also commit algorithms to the marketplace.

The company was formed in 2013, and raised $12.9 million in three funding rounds.

Iron.io provides its Functions serverless application platform that allows businesses to run those apps on a public cloud, private cloud, or on-premises facility. The platform is inserted directly into a running application or can allow for the importation of functions directly from Lamdba.

Iron.io mined $17 million in funding through four rounds.

Spotinst offers its fully managed Functions platform that allows for the running of code regardless of cloud environment. The platform offers a cloud- and vendor-agnostic alternative to offerings like Lambda, Google Cloud Functions, and Azure Functions.

The company earlier this year launched its Functions Document Store that allows developers to store new data with a single API call. This provides quicker access to that data for spinning up new applications.

Spotinst hosted three funding rounds that have raised $17.6 million.

OpsGenie tackles the monitoring of functions running in Lambda with its Thundra platform. This includes the extraction of metrics, logs, distributed tracing, and alerting. Developers can deploy Thundra either manually or automatically with no code changes.

OpsGenie raised $10 million in a single funding round.