NCache Cloud vs. Amazon ElastiCache

Comparison for .NET Teams

Both are fully managed caching services on AWS. Neither asks you to provision servers, apply patches, or watch for failures. Both deploy the cache inside your own VPC - if in-VPC deployment is your requirement, both products meet it.

The differences are whose account the instances are in, where the management plane runs, what can run on the cache servers, and what the cache can do for a .NET application.

At a glance

Fully managed

Everything you'd expect from a managed service - on both products.

This section opens on parity deliberately. NCache Cloud deploys in one click, patches automatically, replaces unhealthy servers, scales at runtime, and delivers telemetry to CloudWatch. So does ElastiCache.

The differences start below.

Runs 100% inside your AWS account

Your VPC, your subnet, your instances. Nothing about NCache Cloud lives outside your account.

• A dedicated, security-group-isolated subnet in a VPC you choose, with cache servers occupying it alone
• Port 9800 is never publicly exposed, in any deployment shape. A Route 53 private hosted zone resolves the endpoint inside your VPC and tracks live instances as the environment scales.
• Data, logs and telemetry stay in your account - telemetry travels AWS's private network over VPC endpoints, not the public internet
• No sub-processors - no third party is introduced into the handling of your data
• On BYOL, no outbound internet access is required at all - licensing activates offline, patching pulls from AWS mirrors and registries, and telemetry reaches CloudWatch over VPC endpoints. Deployable in GovCloud, behind a deny-all egress policy.

ElastiCache also deploys into your VPC, and that is not a reason to switch. If your requirement is that the cache lives inside your own network, both products satisfy it. What follows is what differs once they both clear that bar.

Your servers, in your own account

ElastiCache puts a network interface in your VPC. NCache Cloud puts the instances themselves in your account.

ElastiCache nodes receive private IP addresses in your subnet through network interfaces AWS manages on your behalf. The nodes are operated in an AWS service account - you don't see them in your EC2 console, you can't tag them, and they aren't covered by the tooling you apply to the rest of your fleet. The clearest evidence is a documented constraint: you can't run ElastiCache in a VPC configured for dedicated instance tenancy, because the nodes aren't your instances to place.

NCache Cloud's cache servers are ordinary EC2 instances in your own account:

• Visible and taggable - they appear in your inventory, your Config rules, your cost allocation tags and your security tooling like anything else you run
• Governed by your own controls - your SCPs, your IAM boundaries, your patch and compliance reporting
• Covered by your own commercial agreements - your Reserved Instances and Savings Plans apply, because these are ordinary EC2 instances of a published type
• Able to run your code - see below

This is the distinction the rest of the page depends on. Network presence and account ownership are not the same thing, and most of what NCache Cloud can do that ElastiCache can't follows from the second one.

Management tools inside AWS with integrated security

The NCache Cloud Portal and the NCache Management Center run on your own deployed instances, secured by your own identity provider.

• NCache Cloud Portal - the environment: scaling, maintenance window, upgrades, support access approval
• NCache Management Center - two parts. Cache management for configuring and administering your caches, and real-time monitoring dashboards refreshing every second: requests per second, hit ratio, evictions, per-server load, as they happen. That's the resolution you want during an incident, when the question is what's happening right now rather than a minute ago.
• Both run inside your VPC on port 9900 - so there's no vendor-hosted control plane with a path into your environment
• Secured by Amazon Cognito, with authorisation through your own IAM. No separate NCache permission system, and no local administrator account on the servers.

ElastiCache is administered through the AWS console, which is a good experience your team already knows. The difference isn't usability - it's whose management plane it is, and where it runs.

CloudWatch integration

NCache appears in CloudWatch as a first-class citizen, not through a bridge or an exporter you maintain.

• Metrics, logs and traces in your own account - queryable in CloudWatch Logs Insights alongside your application logs, and correlatable against your application traces
• Alerts through the rules you already have - your existing routing, escalation and retention policies apply automatically
• Telemetry never leaves your account - it travels AWS's private network over VPC endpoints
• Agent installed on every server at deployment and configured then - nothing to install, no collector to run, no exporter to maintain

ElastiCache publishes to CloudWatch too. This is parity on the destination; the difference is the resolution available during an incident, which is the Management Center's job.

NCache Support has no access until you grant it temporarily

No standing access. When support needs to look inside, you approve it - for a fixed number of hours, and it expires on its own.

• No credential outside your environment reaches into it - the control plane runs on your instances, so there's nothing external to grant access from
• Granted per incident, for one, two or four hours, revocable early and declinable entirely
• Supervised, not unattended - sessions run as a live meeting with your staff, while your administrator drives the Cloud Portal and Management Center
• No SSH - diagnostic commands run through the AWS control plane, so no port is opened, no inbound path exists, and no keys need managing

ElastiCache is operated by AWS, which entails operational access to the service. For most buyers that question is settled by AWS's own compliance posture, and it should be. The claim here isn't that NCache Cloud is safer than AWS - it's that nothing outside your account touches your data, and there are no sub-processors to list.

How access control works →

Support is from the people who wrote the cache

One company builds NCache, operates NCache Cloud, and answers when it breaks.

Premium 24x7 answers routine issues the same or next business day, and commits to a one-hour response on a production outage. A hard problem reaches the engineers who wrote the code.

With ElastiCache the service operator and the engine authors are different parties - AWS runs it, the Valkey or Redis project builds it. AWS support is good, and for most issues that separation never surfaces. But a defect in the engine itself becomes an escalation into an open-source project on its own release schedule.

Upgrades happen on your schedule, when you're ready

Security patches automatically. Versions when you're ready.

• OS and NCache patches apply automatically - monthly, at your maintenance window, one server at a time with the cache serving throughout
• MINOR upgrades are live, and opt-in - backward compatible with older clients within the same major version, so nothing needs recompiling
• MAJOR upgrades need a planned maintenance window and are always started by you. The client-server API isn't guaranteed compatible across a major version, so your application is recompiled against the new client SDK.

This is close to parity, and worth saying so. ElastiCache service updates are self-service: you choose when to apply them, and where an update isn't set to auto-apply after its recommended date, AWS doesn't apply it for you at all. Unlike some managed caches, neither product forces a version change on you.

One asymmetry, on Serverless. ElastiCache Serverless receives service updates automatically and transparently, and they can't be managed through Service Updates. If update control is a compliance requirement, that rules out the Serverless option specifically - not ElastiCache as a whole.

Scaling at runtime

Add or remove cache servers while the cache is serving.

• Add or remove servers at runtime - data redistributes as capacity changes
• No cache or client application downtime - private DNS picks up the new membership
• Admin initiated - scaling is yours to start, not something that happens under load

Changing server profile is a migration rather than an in-place operation - a reason to size with headroom.

ElastiCache Serverless scales automatically with no capacity planning at all, which is a genuine advantage for spiky workloads and has no NCache Cloud equivalent.

99.99% uptime

NCache Cloud is built to run through the failures that take a cache down - a server, a rack, a datacenter, or an entire region.

• 99.99% uptime with multi-site - two sites in separate Availability Zones or separate regions, synchronised by NCache Bridge and both serving traffic. This is also the configuration covered by the Amazon Compute SLA's 99.99% Region-Level commitment for the EC2 instances underneath.
• Partition-Replica and Replicated caches - every item has a second copy on another server
• Unhealthy servers restart automatically - NCache runs as the main process in its container under a restart policy, so a process failure recovers in seconds; if the instance is unhealthy, the Auto Scaling Group replaces it
• Rolling patches, no downtime - one server at a time, each verified healthy before the next

ElastiCache carries a contractual uptime SLA and NCache Cloud does not - 99.99% for Multi-AZ and Serverless, 99.5% Single-AZ, with service credits. We don't offer one because NCache Cloud runs in your account, where your own changes can reach the instances. That's the same fact that makes the instances yours.

What we commit to contractually is response: with Premium 24x7, same or next business day for routine issues and one hour for a production outage.

If a vendor uptime SLA on the cache service itself is a hard requirement, ElastiCache meets it and NCache Cloud doesn't.

Multi-Region Deployment with WAN Replication

Deploy two regions from the same wizard, and NCache Bridge keeps them synchronised across the WAN - both writable.

• One click, two regions - the same wizard as a single site, running in 20 minutes
• Both sites accept reads and writes. Conflicts resolve by last-update-wins or a handler you write. Lose a region and the other keeps serving, with no promotion step.
• What you provide, and what it costs - a second VPC in the target region, with peering created at deployment. Cross-region replication traffic is billed to you by AWS and scales with write volume.

ElastiCache Global Datastore is active-passive. A primary cluster accepts writes and replicates to up to two secondary regions, which accept reads only. If the primary region degrades, you promote a secondary manually and repoint your write endpoint.

For a disaster-recovery posture that's a reasonable design, and AWS documents it as such. For an application that needs to write locally in more than one region, it means routing every write back to the primary region - which is the latency the multi-region deployment was meant to remove.

AWS does offer active-active multi-region replication in MemoryDB, a different service with a different durability and cost model. If you're evaluating that instead, the comparison here is with ElastiCache.

Your own code on the cache servers

Because the servers are in your account, they can run your code - .NET assemblies you deploy through the NCache Management Center.

• Read-through, write-through, write-behind - a cache miss loads from your database without a round trip back to your application, and updates write back either synchronously or with your application returning immediately
• Loader, refresher - warm the cache at startup so the first user after a deployment doesn't pay for a cold cache, and keep it current against its source
• Bridge conflict handler - your own rule when two regions write the same key

ElastiCache has no equivalent, and structurally can't: no hosted multi-tenant engine can execute customer code on its own infrastructure. These aren't patterns that are harder on ElastiCache - they're patterns you implement in your application instead, or not at all.

Assemblies target .NET rather than .NET Framework, since the cache servers run Linux.

Plans and Multi-Cloud

Hourly, a 30-day trial, or bring your own license - and the same license works on Azure.

• Hourly - pay-as-you-go through AWS Marketplace, with no licensing to manage. One-year committed pricing through a private offer.
• Free Trial - 30 days, complete product, no size limit, extendible on request
• BYOL - use an NCache license you already own. ElastiCache is AWS-only, so a multi-cloud estate runs one cache from one license pool. If your estate is entirely AWS this changes nothing; it matters when a second cloud appears.

Software and infrastructure bill separately, and the infrastructure is yours. ElastiCache bills node-hours as a service, and reserved nodes apply to ElastiCache. NCache Cloud bills EC2 directly to your AWS agreement at whatever rate you've negotiated - enterprise discount programs, private pricing agreements - with your own Reserved Instances and Savings Plans applying to those exact machines. The concrete version: pay-as-you-go software on three-year reserved hardware.

The point isn't that NCache Cloud is cheaper. It's which components you can see, reserve and negotiate.

Advanced .NET caching

Built for .NET, not adapted for it. The cache servers are 100% native .NET.

Client Cache keeps a near-cache inside your application process, synchronised with the distributed cache. Full Data Client Cache preloads an entire reference dataset next to your application and lets you query it with SQL or LINQ - data served from your own process never crosses the network. ElastiCache has no equivalent.

• SQL and LINQ queries - search cached objects by their properties, not just by key
• Tags and Named Tags - organise and retrieve related data as a group
• EF Core caching - cache query results and entities through extension methods
• IDistributedCache and ASP.NET Core - a drop-in with no code change, plus sessions with multi-site support and intelligent locking
• SignalR backplane, Pub/Sub messaging with item-level and cache-level events
• Clients - .NET 8+, .NET Framework 4.8, Java, Node.js and Python

Redis and Valkey have excellent .NET clients and millions of applications use them successfully. The difference isn't client quality - it's that these capabilities exist at all.

Coming from Redis, Valkey or Memcached

There's no forced migration here, so the honest question is what a move would cost.

Two things make it less work than it might look. If your application uses IDistributedCache, it's a configuration change rather than a code change. If it uses Redis APIs directly, the Redis Wrapper API covers most of the surface.

Frequently Asked Questions (FAQ)

ElastiCache is already in my VPC. What does NCache Cloud actually change?

Whose account the instances are in. ElastiCache nodes are reachable from your VPC but operated in an AWS service account, so they aren't yours to tag, reserve, inventory or run code on. NCache Cloud's servers are ordinary EC2 instances in your account. Everything else on this page follows from that.

Is NCache Cloud as managed as ElastiCache?

Yes. Provisioning, patching, monitoring, health-based replacement, scaling and high availability are all handled. The exception is Serverless — NCache Cloud has no equivalent, so you choose a server profile and count.

Does NCache Cloud support the Redis protocol?

There's a Redis Wrapper API to reduce migration effort, but NCache Cloud is not a Redis-protocol server.

Which is faster?

Both are in-memory distributed caches, and real-world performance depends far more on your topology, serialisation and access patterns than on the product. The structural difference worth knowing is Client Cache — data served from your application's own process doesn't cross the network at all.

Can I use my AWS commitment?

Yes, for the infrastructure. The EC2 instances bill directly to your AWS agreement, and your Reserved Instances and Savings Plans apply to them.

What happens to my data if I stop using NCache Cloud?

Delete the deployment and the environment leaves your account. Nothing of yours was held anywhere else, so there's nothing to retrieve.

Does NCache Cloud run on Azure?

Yes, with the same BYOL license.

Can Amazon engineers see my cache data in ElastiCache?

ElastiCache is operated by AWS, which entails operational access to the service. AWS's own documentation is the right source for the specifics.