Sia

Sia provides encrypted cloud storage through a consumer app and tools for developers who want to build storage into applications. Files are encrypted on the user’s device before upload. Sia says they are stored redundantly across independent hosts worldwide and can be downloaded in parallel from multiple hosts. Its peer-to-peer network has no central access point or single point of failure.

The Free plan includes 50 GB of storage. Plus costs $7.99 a month for 500 GB, Pro costs $14.99 a month for 5 TB, and Unlimited costs $19.99 a month for 10 TB, with additional storage listed at $4.99/TB-mo. Separately, the network page lists median rates of $3.53/TB/month for storage at 3X redundancy, $0.03/TB for upload, and $2.25/TB for download. Developers can use SDKs for Rust, Go, Python, and JavaScript, or connect through the S3-compatible s3d gateway. Sia is an open-source project supported by the Sia Foundation and community donations.

Sia combines a consumer storage app with developer tools and a peer-to-peer storage network. Compare the consumer plan limits with the separately listed network rates to understand which pricing applies to your use.

Sia suits people seeking encrypted storage and developers building applications that use the Sia network. Its SDK and gateway options also serve users connecting compatible tools or a self-hosted indexer.

Sia is a decentralized storage service with a consumer app and tools for developers. It best suits privacy-conscious users and builders who want to use a peer-to-peer storage network. Its device-side encryption and distinct consumer and network pricing are compelling, but choosing the right route matters.

Overview

Sia combines consumer cloud storage with developer access to a peer-to-peer network. Files are encrypted on the user’s device before upload, and the service says nobody else can read them. It says files are stored redundantly across independent hosts worldwide and can be downloaded in parallel, avoiding reliance on a central access point or single point of failure.

The project was founded in 2013 and describes itself as open source, supported by the nonprofit Sia Foundation and community donations. The Sia Storage site identifies The Sia Storage Company. Support is offered through Discord’s help channel or [email protected].

Key features

• On-device encryption: Files are encrypted before upload, a clear privacy advantage for people who do not want hosts to read their files.
• Distributed storage: Redundant storage across independent hosts and parallel downloads suit users comfortable with a network-based alternative to centralized cloud storage.
• SDKs and integrations: Storage SDKs are available for Rust, Go, Python, and JavaScript. The S3-compatible s3d gateway works with rclone, Cyberduck, Nextcloud, Duplicati, and other S3 clients, giving developers and existing-tool users several ways to connect.
• Self-hosting: The SDK can connect to any indexer, including one users host themselves. That flexibility is useful for technically capable operators, but less relevant to someone seeking only a straightforward consumer plan.
• Hybrid network and IPFS: Sia identifies its network as hybrid and supports IPFS, alongside client-side encryption.

Pricing

The consumer plans are freemium, with storage, app-count, speed, and—in one tier—overage limits that determine who gets the best fit:

• Free — free: 50 GB storage, 3 apps, and 500 Mbps. It is a useful no-cost starting point, but the 50 GB cap limits it for larger libraries.
• Plus — $7.99 a month: 500 GB storage, 3 apps, and 500 Mbps. This adds ten times the free capacity while retaining the same app and speed limits, making it the modest step up for individual storage needs.
• Pro — $14.99 a month: 5 TB storage, 5 apps, and 1 Gbps. The larger quota and higher speed suit users with substantial storage needs who can make use of the added app allowance.
• Unlimited — $19.99 a month: 10 TB storage, $4.99/TB-mo over, 100 apps, and 5 Gbps. It offers the largest stated quota and generous app and speed limits, though storage beyond 10 TB incurs the stated per-terabyte monthly charge.

These consumer tiers should not be confused with network usage pricing: the network page gives median rates of $3.53/TB/month for storage at 3X redundancy, $0.03/TB for upload, and $2.25/TB for download. That usage-based model is more relevant to developers or users working directly with the network; consumer-plan prices and network rates apply to different uses.

Platforms

Sia supports Android, iOS, Linux, macOS, Windows, and web, as well as API access and self-hosted use. The breadth makes it relevant to both mobile and desktop storage users, while API and self-hosted options extend it to application builders and operators.

Who it's for

Sia is a strong fit for people who prioritize device-side encryption and want storage spread across independent hosts, as well as developers building applications around decentralized storage. The SDK choices, S3-compatible gateway, and self-hosted indexer option give technical users meaningful flexibility. It is less suited to someone who wants a single simple pricing model without distinguishing consumer capacity plans from network usage rates.

Pros and cons

• Pro — Privacy-focused upload: Files are encrypted on the user’s device before upload, and Sia says nobody else can read them.
• Pro — Flexible developer access: SDKs for four languages, an S3-compatible gateway, and support for a self-hosted indexer offer several integration paths.
• Pro — Clear consumer capacity steps: The plans specify storage, app counts, and speeds, with free access up to 50 GB.
• Con — Two pricing models to distinguish: Consumer plan fees and network usage rates serve different use cases, so users need to identify which applies before estimating cost.
• Con — Free and lower tiers are bounded: Free stops at 50 GB, while Plus remains at 500 Mbps and 3 apps; users needing greater capacity or speed must move up.

Alternatives

For a broader comparison, browse Decentralized Storage Services.

• Carbide Network may suit users comparing a paid service with a home-provider option billed at $0.002/GB and estimated earnings of $24/year per TB, or personal storage billed at the same rate.
• Peergos is worth considering for users who prioritize a fully open-source product, including its server, and reproducible builds.
• Datum Storage may appeal to users who want one free terabyte for the first year, with additional storage priced at $3.99 a month per terabyte.
• Stratos is another freemium option with broad desktop, mobile, web, API, and self-hosted platform support.
• Arweave is another paid option with broad platform support, including API, extension, and self-hosted access.
• DeNet Storage may suit users considering prepaid storage balances, including a stated 1 TB for one year at 100 GAS per month.
• Pinata is an option for API and web users looking at paid tiers such as Picnic, which includes 1 TB storage and 500 GB bandwidth for $20 a month.
• 4EVERLAND is a web-based freemium alternative with a free Standard tier that includes 6 GB of IPFS storage per month and 10 GB of bandwidth per month.

Verdict

Choose Sia if you want encrypted storage distributed across independent hosts, or if you are building an application and value its SDKs and S3-compatible gateway. The main reason to look elsewhere is that its consumer subscriptions and network usage rates serve different needs; users who want one uncomplicated pricing path may prefer an alternative with a clearer fit for their workflow.