Cheapest Object Storage in 2026: S3 Alternatives Compared

Object Storage Doesn't Have to Cost AWS Prices

AWS S3 defined the object storage category, and its pricing became the benchmark everyone accepts without questioning. But $0.023 per GB/month adds up fast. If you're storing 100 TB, that's $2,300/month just for storage -- before you touch egress, API calls, or retrieval fees. In 2026, a wave of S3-compatible providers offers the same API, comparable durability, and dramatically lower prices.

I've migrated workloads from S3 to three different providers over the past two years. Some were seamless. Some had gotchas that cost me more than S3 would have. This guide breaks down the real pricing -- including the hidden fees vendors bury in footnotes -- and tells you exactly when each provider makes sense.

What Is Object Storage?

Definition: Object storage is a data architecture that manages data as discrete objects, each containing the data itself, metadata, and a unique identifier. Unlike file systems (hierarchical) or block storage (fixed-size chunks), object storage provides a flat namespace accessible via HTTP APIs, making it ideal for unstructured data at any scale.

Every major cloud provider offers object storage: AWS S3, Google Cloud Storage, Azure Blob Storage. The S3 API has become the de facto standard -- most alternative providers implement it, so you can switch providers by changing an endpoint URL and credentials. That portability is the foundation of the cost optimization strategies in this guide.

Complete Pricing Comparison (2026)

This table shows the real cost for storing 10 TB with 1 TB of monthly egress and 10 million API requests. These are the three cost components that matter -- most "cheap storage" comparisons only show the storage rate and hide egress.

Provider	Storage (10 TB)	Egress (1 TB)	API Calls (10M)	Total/Month
AWS S3 Standard	$230	$90	$5	$325
Google Cloud Storage	$230	$120	$5	$355
Azure Blob (Hot)	$208	$87	$5	$300
Backblaze B2	$60	$10	$4	$74
Cloudflare R2	$150	$0	$4.50	$155
Wasabi	$70	$0	$0	$70
IDrive e2	$40	$0 (3x storage)	$0	$40
Storj	$40	$70	$0	$110

The difference is staggering. Backblaze B2 costs 77% less than S3 Standard for this workload. Cloudflare R2's zero-egress pricing makes it 52% cheaper. Even Wasabi at $70/month is nearly 80% savings. But these numbers need context -- durability, performance, and feature gaps matter.

Warning: Wasabi's "no egress fees" has a catch. If your monthly egress exceeds your total storage, they charge the difference at the storage rate. So if you store 10 TB and download 15 TB, you pay for 15 TB of storage that month. This matters for CDN origin or high-download workloads.

Provider Deep Dives

Backblaze B2

At $0.006/GB/month for storage and $0.01/GB for egress, B2 is one of the cheapest options. It's S3-compatible, supports lifecycle rules, and offers 99.999999999% (11 nines) durability. The catch: B2 has a single storage region (US West or EU Central), no built-in CDN, and limited IAM capabilities. B2 partners with Cloudflare for free egress through the Bandwidth Alliance, which is the best-kept secret in cloud storage -- store on B2, serve through Cloudflare, pay zero egress.

Cloudflare R2

R2's killer feature is zero egress fees, forever. Storage costs $0.015/GB/month -- more expensive than B2 but cheaper than S3. R2 stores data across multiple regions automatically, integrates natively with Cloudflare Workers for edge compute, and supports the S3 API. Downsides: no storage classes (everything is hot), no lifecycle transitions, and no server-side encryption with customer-managed keys as of early 2026.

Wasabi

Wasabi charges $0.0069/GB/month with no API call fees and no egress fees (with the storage-ratio caveat above). Performance is competitive with S3 for single-object operations but slower for listing large buckets. Wasabi stores data in multiple regions and claims 11 nines of durability. The minimum storage duration is 90 days -- delete an object before 90 days, and you're still charged for the full 90.

IDrive e2

The cheapest per-GB option at $0.004/GB/month. Free egress up to 3x your stored data. S3-compatible API. The trade-off is less mature tooling, fewer regions (3 US, 1 EU), and a smaller company backing the service. For archival and backup workloads where you won't push the limits of the API, it's remarkably cost-effective.

Storj

Storj uses a decentralized storage network -- your data is encrypted, split into pieces, and distributed across thousands of independent nodes. Storage is $0.004/GB/month, egress is $0.007/GB. The decentralized architecture provides inherent redundancy and censorship resistance. Performance is good for large file downloads but slower for small random reads due to the distributed nature. S3-compatible gateway available.

When to Stay on S3

S3 is expensive, but it's expensive for reasons that matter in certain workloads:

Tight AWS integration -- Lambda triggers, Athena queries, EMR data lakes, CloudFront origin. If your stack is AWS-native, switching storage providers means rebuilding these integrations.
Multiple storage classes -- S3 Glacier Instant Retrieval ($0.004/GB), Glacier Flexible ($0.0036/GB), and Glacier Deep Archive ($0.00099/GB) are cheaper than any alternative for cold data. No S3 alternative offers comparable tiered storage.
Compliance requirements -- S3 Object Lock for WORM compliance, Macie for sensitive data discovery, and detailed CloudTrail logging. Regulated industries often require these features.
Sub-10ms latency -- S3 delivers consistent single-digit millisecond latency for GET requests. Alternatives typically deliver 20-50ms, which matters for real-time applications.

Pro tip: Use S3 Intelligent-Tiering for data with unpredictable access patterns. It automatically moves objects between access tiers based on usage, with no retrieval fees. The monitoring fee is $0.0025 per 1,000 objects/month -- trivial for most workloads and it can save 40-70% compared to keeping everything in S3 Standard.

Migration Guide: Moving Off S3

Step 1: Audit Your Usage

Pull your S3 cost breakdown from AWS Cost Explorer. Separate storage, egress, and API calls. Identify which buckets are candidates for migration (large, infrequently accessed, not tightly coupled to AWS services).

Step 2: Test S3 API Compatibility

Not all S3-compatible providers implement the full API. Test your specific operations: multipart uploads, presigned URLs, bucket policies, CORS configuration, and any SDK-specific features you rely on.

Step 3: Run a Parallel Workload

Write new data to both S3 and the target provider for 2-4 weeks. Compare latency, error rates, and actual costs against projected savings. This catches integration issues before you commit.

Step 4: Migrate Existing Data

Use rclone for bulk migration. It supports parallel transfers, checksum verification, and resume on failure.

# Migrate from S3 to Backblaze B2
rclone sync s3:my-bucket b2:my-bucket \
  --transfers 32 \
  --checkers 16 \
  --s3-chunk-size 64M \
  --progress \
  --log-file migration.log

# Verify data integrity
rclone check s3:my-bucket b2:my-bucket --one-way

Step 5: Update Application Config

Since most alternatives support the S3 API, migration is often just changing the endpoint URL and credentials:

// Before (AWS S3)
const s3 = new S3Client({ region: 'us-east-1' });

// After (Backblaze B2)
const s3 = new S3Client({
  region: 'us-west-004',
  endpoint: 'https://s3.us-west-004.backblazeb2.com',
  credentials: {
    accessKeyId: process.env.B2_KEY_ID,
    secretAccessKey: process.env.B2_APP_KEY,
  },
});

Cost Optimization Strategies

Regardless of provider, these strategies reduce object storage costs:

Lifecycle policies -- automatically transition or delete objects after a set period. A 30-day lifecycle on log files can cut storage costs by 90%.
Compression before upload -- gzip or zstd compression reduces storage by 60-80% for text-based data (logs, JSON, CSV)
Deduplication -- use content-addressable storage patterns to avoid storing identical objects multiple times
Right-size multipart thresholds -- uploading many small files is more expensive (per-request fees) than fewer large files. Batch small objects when possible.
Cache aggressively -- put a CDN in front of your storage to reduce egress. Cloudflare + Backblaze B2 means zero egress cost via the Bandwidth Alliance.

Durability and Reliability Comparison

Provider	Durability	Availability SLA	Regions
AWS S3	99.999999999% (11 nines)	99.99%	30+
Backblaze B2	99.999999999%	99.9%	2
Cloudflare R2	99.999999999%	99.9%	Multi-region auto
Wasabi	99.999999999%	99.9%	12
IDrive e2	99.999999999%	99.9%	4
Storj	99.9999999% (9 nines)	99.95%	Decentralized

All major providers claim 11 nines of durability, matching S3. The difference is in availability SLAs and the track record backing those claims. S3 has a 17-year track record with billions of objects. Newer providers make the same durability claims but with less operational history.

Frequently Asked Questions

Is Backblaze B2 reliable enough for production?

Yes, for most workloads. B2 has been operating since 2015 and stores over 2 exabytes of customer data. They publish regular durability reports. The main limitation is fewer regions compared to S3, which means higher latency for users far from US West or EU Central. For backup, archival, media storage, and CDN origin use cases, B2 is production-ready and well-proven.

Can I use Cloudflare R2 as a drop-in S3 replacement?

For most applications, yes. R2 implements the S3 API and works with standard S3 SDKs by changing the endpoint. However, R2 lacks S3-specific features like Object Lock, Glacier storage classes, inventory reports, and batch operations. Test your specific workflow before migrating. For straightforward read/write/list operations with presigned URLs, R2 works identically to S3.

What are the hidden costs of cheap object storage?

The most common hidden costs are minimum storage duration charges (Wasabi charges for 90 days even if you delete earlier), minimum object size fees (some providers charge for a minimum of 128 KB per object), and egress-to-storage ratio penalties. Always read the full pricing page, not just the headline per-GB rate. Run your actual workload pattern through the pricing calculator.

How much does S3 egress actually cost?

S3 charges $0.09/GB for the first 10 TB of egress per month, dropping to $0.085/GB for the next 40 TB, and $0.07/GB for the next 100 TB. At 10 TB of monthly egress, you pay $900/month just for data transfer. This is why egress-free providers like R2 and Wasabi are so compelling for high-download workloads. AWS also offers free egress to CloudFront, so using CloudFront as a CDN avoids direct S3 egress fees.

Is it safe to store sensitive data on alternative providers?

All providers listed here encrypt data at rest and in transit. B2, R2, and Wasabi support server-side encryption. For regulated data, verify the provider's compliance certifications (SOC 2, HIPAA, GDPR). Backblaze and Wasabi have SOC 2. Cloudflare R2 inherits Cloudflare's SOC 2 and ISO 27001 certifications. For maximum control, encrypt data client-side before upload regardless of provider.

What about AWS S3 Glacier for archival?

For true cold archival (data accessed less than once a year), S3 Glacier Deep Archive at $0.00099/GB/month is unbeatable. That's $1/TB/month. No alternative comes close for archival pricing. The trade-off is retrieval time (12 hours for standard retrieval) and retrieval fees. If you need both hot and cold storage, use S3 with lifecycle policies for cold data and a cheaper provider for hot data.

Can I use multiple storage providers simultaneously?

Absolutely, and many teams do. Use S3 for data tightly coupled with AWS services (Lambda, Athena, EMR). Use B2 or R2 for media files, backups, and CDN-served assets. Use Glacier for long-term archival. Tools like rclone and MinIO gateway make multi-provider setups manageable. The S3 API compatibility across providers means your application code stays mostly the same.

Pick the Right Provider for Each Workload

There's no single cheapest option -- it depends on your access patterns. For CDN-served media with high egress, Cloudflare R2's zero-egress pricing wins. For bulk backup and archival, Backblaze B2 paired with Cloudflare delivers the best overall value. For cold archival you rarely touch, S3 Glacier Deep Archive at $1/TB/month is unmatched. And for data tightly integrated with AWS analytics tools, S3 is still the pragmatic choice despite the premium. Start by auditing your current storage costs, identify the buckets with the highest egress bills, and migrate those first. The savings compound fast.