Cheapest Object Storage in 2026: S3 Alternatives Compared

$325 on S3. $40 on IDrive e2. Same 10 TB, Same API, Different Bill.

I priced the identical workload -- 10 TB stored, 1 TB egress per month, 10 million API calls -- across eight S3-compatible providers for a side project in April 2026. Here is what the monthly bill came back as, rounded to the nearest dollar:

Provider	Storage	Egress	Requests	Total / month	Delta vs S3
AWS S3 Standard	$230	$90	$5	$325	baseline
Azure Blob (Hot)	$208	$87	$5	$300	-8%
Google Cloud Storage	$230	$120	$5	$355	+9%
Cloudflare R2	$150	$0	$4.50	$155	-52%
Storj	$40	$70	$0	$110	-66%
Backblaze B2	$60	$10	$4	$74	-77%
Wasabi	$70	$0*	$0	$70	-78%
IDrive e2	$40	$0**	$0	$40	-88%

*Wasabi "no egress" only holds while monthly egress stays under total storage. Go over and the excess is billed at the storage rate. **IDrive e2 is free up to 3x your stored data, then charges normal egress.

The headline number -- IDrive e2 at 88 percent less than S3 -- is real but deeply misleading. AWS costs $285/month more because it offers features the cheap providers do not: tight Lambda/Athena/CloudFront integration, Object Lock for WORM compliance, Glacier Deep Archive at $0.99/TB/month, and a 17-year operational track record. If you store audit logs that regulators will ask about in 2033, that track record matters more than any per-GB rate. If you store cat pictures behind a CDN, it does not.

This guide walks through the seven S3 alternatives in that table, the hidden fees each one buries in its pricing page (90-day minimum durations, 128 KB minimum object sizes, egress-to-storage ratio traps), the workloads where it still pays to stay on S3, and a step-by-step migration playbook using rclone for the bulk copy. The goal is to tell you exactly which provider saves money for your access pattern -- not the cheapest headline rate.

How Object Storage Bills Actually Work

Quick context: Object storage is a data architecture that treats data as discrete objects (data + metadata + a unique key) in a flat namespace rather than a directory tree or block volume. S3 set the API standard in 2006; every provider in the table above implements that same S3 API, which is why switching providers is usually a matter of changing an endpoint URL and a pair of credentials.

Every object-storage invoice breaks down into the same three components, and the cheapest provider per component is almost never the same as the cheapest provider overall:

• Storage, billed per GB per month, on the time-weighted average of objects in the bucket. IDrive e2 and Storj win here at $0.004/GB. S3 Deep Archive wins at $0.00099/GB for data accessed less than once a year.
• Egress, billed per GB of outbound traffic leaving the provider's network. R2 and Wasabi (with the caveat above) charge $0. S3 charges $0.09/GB for the first 10 TB/month.
• Requests, billed per 1,000 or per 10,000 API calls. Cheap for most workloads but can dominate the bill for apps that write millions of tiny objects. Wasabi and IDrive e2 bundle requests into storage.

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. IDrive e2 applies a similar ratio cap at 3x stored data.

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:

1. 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.
2. 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.
3. Compliance requirements -- S3 Object Lock for WORM compliance, Macie for sensitive data discovery, and detailed CloudTrail logging. Regulated industries often require these features.
4. 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

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.