Last updated: May 2026
The cheapest S3 alternatives in May 2026 are IDrive e2 and Storj at $0.004/GB/month for raw storage, Backblaze B2 at $0.006/GB (with Cloudflare egress free), Cloudflare R2 at $0.015/GB with zero egress fees, and Wasabi at $0.0099/GB flat with caveats. AWS S3 at $0.023/GB storage + $0.09/GB egress is 3-10x more expensive than every option here for typical workloads. This guide compares the eight real S3 alternatives — their per-GB cost, egress policies, gotchas, and which one actually fits which workload.
For Cloudflare R2 vs S3 head-to-head, see R2 vs S3. For storage architecture in broader context, see Cheap Dedicated Server.
S3 alternatives at a glance (May 2026)
| Provider | Storage $/GB/mo | Egress | API compat | Best for |
|---|---|---|---|---|
| AWS S3 (baseline) | $0.023 | $0.09/GB | S3 (reference) | AWS lock-in, advanced features |
| Cloudflare R2 | $0.015 | $0 | S3-compatible (core) | Egress-heavy, hot serving |
| Backblaze B2 | $0.006 (w/ Cloudflare) | $0.01/GB (free with CF) | S3-compatible | Cold backup, low-egress |
| Wasabi | $0.0099 | $0 (with 1:1 ratio) | S3-compatible | Backup, write-once |
| IDrive e2 | $0.004 | Free up to 3x stored | S3-compatible | Cheapest raw storage |
| Storj | $0.004 | $0.007/GB | S3-compatible | Decentralized, privacy |
| DigitalOcean Spaces | $0.02 (with 250GB egress) | $0.01/GB above | S3-compatible | DO ecosystem teams |
| MinIO (self-host) | $0.002-0.004 | Free (own bandwidth) | S3-compatible | High-volume on-prem |
Real pricing example — 10 TB stored, 1 TB egress/month
| Provider | Storage | Egress | API | Total |
|---|---|---|---|---|
| AWS S3 | $235 | $90 | ~$5 | $330 |
| Cloudflare R2 | $153 | $0 | ~$5 | $158 |
| Backblaze B2 (with CF) | $61 | $0 (1TB < 3x10TB) | ~$5 | $66 |
| Wasabi | $101 | $0 (1TB ≤ 10TB stored) | $0 | $101 |
| IDrive e2 | $40 | $0 (1TB < 3x10TB) | $0 | $40 |
| Storj | $40 | $7 | $0 | $47 |
| DigitalOcean Spaces | $50 | ~$8 above 250GB | $0 | $58 |
For this representative workload, IDrive e2 at $40/month is the cheapest, with Storj close behind at $47. AWS S3 at $330 is 8x more expensive than the cheapest option.
Cloudflare R2 — zero egress is the headline
R2's pitch: $0 egress, ever. No fair-use caps, no throttling at high ratios, no CDN partner requirements. Storage at $0.015/GB.
Where R2 wins big: any workload where egress > 30% of total cost. Media CDNs, AI training data served to cloud GPUs, file downloads, static site assets, public datasets.
Where R2 doesn't matter: low-egress workloads (analytics archives, daily backups). The egress savings are marginal when egress is rare; storage cost dominates and B2 / IDrive e2 / Storj are cheaper.
See R2 vs S3 for the deep comparison.
Backblaze B2 — cheapest backup play
B2 storage is $0.005-$0.006/GB/month. Egress to Cloudflare is free (via the Bandwidth Alliance). Egress elsewhere is $0.01/GB.
Where B2 wins: bulk backup, archival, infrequently-accessed cold storage. Combine with Cloudflare CDN for free egress and you have a near-perfect cheap-backup architecture.
Where B2 loses: hot serving with many small requests — B2's per-API rates add up. For frequent reads, R2's per-class request pricing is more favorable.
Wasabi — flat-rate with 90-day catch
Wasabi is $0.0099/GB/month flat, no egress fees, no API charges. Two policy catches:
- 90-day minimum retention. Every object is billed for at least 90 days, even if deleted earlier. For high-churn data (caches, temp files), effective cost can be 2-3x the headline rate.
- Reasonable use egress. Monthly egress can't exceed stored volume. For CDN workloads with egress 10x stored, Wasabi will throttle or charge extra.
Where Wasabi wins: write-once-read-occasionally compliance archives, long-term backups, audit logs. The flat rate is easy to budget; the policies don't bite for these workloads.
Where Wasabi loses: anything with frequent deletions or high egress.
IDrive e2 — cheapest raw storage
IDrive e2 is $0.004/GB/month with free egress up to 3x your stored data. S3-compatible API.
Trade-offs: No storage classes (everything is hot tier). No lifecycle transitions to cheaper archive. No customer-managed key encryption (CMK) as of early 2026.
Where e2 wins: simple bulk storage where you want the lowest per-GB rate and don't need advanced features.
Where e2 loses: if you need Glacier-style archive transitions, CMK, or any S3 enterprise feature.
Storj — decentralized at $0.004/GB
Storj distributes data across 30,000+ nodes in 100+ countries via cryptographic sharding. End-to-end encryption is default. S3-compatible API.
Pricing: $0.004/GB storage + $0.007/GB egress.
Where Storj wins: privacy-conscious workloads (data is sharded so no node sees a full object), redundancy-critical archives (no single point of failure), and GDPR-style data residency questions (data isn't physically in any one country).
Where Storj loses: smaller ecosystem than R2 / B2. Fewer SaaS integrations, fewer recipes online, fewer Stack Overflow answers.
DigitalOcean Spaces — for DO ecosystem teams
Spaces at $5/month for 250 GB storage + 1 TB egress. Above quota: $0.02/GB storage, $0.01/GB egress.
Where Spaces wins: teams already on DigitalOcean. Single bill, same dashboard, integration with DO infrastructure.
Where Spaces loses: raw per-GB cost. Cheaper to use R2 / B2 / e2 if you can tolerate the cross-cloud setup.
MinIO — self-host for max savings
MinIO is open-source S3-compatible storage you run on your own hardware (commodity servers, dedicated racks, even a home lab).
Cost: $0.002-$0.004/GB raw at 70%+ utilization. Below that, fixed hardware costs dominate.
Hidden costs: operations. Realistic:
- Disk failures (~1/year per 24-drive server).
- OS patching, security updates.
- Capacity planning, hardware refresh.
- Monitoring, alerting.
- 0.25-0.5 FTE engineering time amortized.
Where MinIO wins: >100 TB sustained storage, on-prem regulatory requirements, full data sovereignty, environments where you already have ops capacity.
Where MinIO loses: small teams. Paying B2's $0.006/GB to skip ops headache is almost always the right call below 50 TB.
Migration patterns
Most teams stitch together multiple providers for tiered storage:
- Hot serving / CDN: Cloudflare R2 (zero egress).
- Daily backup / point-in-time recovery: Backblaze B2 (cheap, free egress to Cloudflare).
- Long-term archive: IDrive e2 or Storj (cheapest raw).
- Compliance / immutability: AWS S3 with Object Lock (the one feature alternatives don't have).
Migration tools:
- Cloudflare Super Slurper: free, one-time migration from S3 to R2.
- rclone: open-source, S3-compatible transfers between any pair.
- aws s3 sync: for AWS-to-AWS-compatible moves.
- rsync over s3fs / mc (MinIO Client): for MinIO endpoints.
Most apps complete migration in 1-2 days of engineering work for typical data volumes (under 10 TB).
When NOT to migrate from S3
- Object Lock compliance. WORM (Write-Once-Read-Many) for SEC 17a-4 or HIPAA. Only S3 has it.
- Glacier / Deep Archive tier. Sub-cent/GB cold storage. Only S3 has it.
- S3 Batch Operations. Operating on billions of objects. Only S3.
- Intelligent-Tiering. Automatic class transitions. Only S3.
- Deep AWS integration. Lambda triggers, Glue catalog, Athena, SageMaker, RDS — all of these speak S3 natively.
Common mistakes when picking S3 alternative
- Optimizing storage without measuring egress. Cheap storage + expensive egress = no savings.
- Ignoring 90-day retention on Wasabi. Cost-modeling without this misses 30-200% overruns on high-churn workloads.
- Self-hosting MinIO at small scale. The ops cost dominates below 50 TB.
- Skipping the dual-write phase. Big-bang migrations break things.
- Forgetting Object Lock for compliance. If your auditor needs WORM, you stay on S3 (or pay for a separate compliance vault).
Quick decision tree
- Egress >30% of bill, high read volume: Cloudflare R2.
- Daily backups, low egress: Backblaze B2 + Cloudflare.
- Lowest raw $/GB, basic features: IDrive e2 or Storj.
- Write-once archive, predictable egress: Wasabi.
- DigitalOcean ecosystem: Spaces.
- >100 TB on-prem with ops capacity: MinIO.
- Need Object Lock / Glacier / advanced AWS features: AWS S3.
