Cloud Storage API Comparison 2026

// AWS SDK v3 — Cloudflare R2 (just change endpoint)
import { S3Client, PutObjectCommand } from "@aws-sdk/client-s3";
import { readFileSync } from "fs";

const r2 = new S3Client({
  region: "auto",
  endpoint: "https://<ACCOUNT_ID>.r2.cloudflarestorage.com",
  credentials: {
    accessKeyId: process.env.R2_ACCESS_KEY,
    secretAccessKey: process.env.R2_SECRET_KEY
  }
});

await r2.send(new PutObjectCommand({
  Bucket: "my-bucket",
  Key: "photos/sunset.jpg",
  Body: readFileSync("./sunset.jpg"),
  ContentType: "image/jpeg"
}));

// AWS SDK v3 — Backblaze B2 (S3-compatible endpoint)
import { S3Client, PutObjectCommand } from "@aws-sdk/client-s3";
import { readFileSync } from "fs";

const b2 = 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
  }
});

await b2.send(new PutObjectCommand({
  Bucket: "my-bucket",
  Key: "photos/sunset.jpg",
  Body: readFileSync("./sunset.jpg"),
  ContentType: "image/jpeg"
}));

// AWS SDK v3 — Wasabi (S3-compatible endpoint)
import { S3Client, PutObjectCommand } from "@aws-sdk/client-s3";
import { readFileSync } from "fs";

const wasabi = new S3Client({
  region: "us-east-1",
  endpoint: "https://s3.wasabisys.com",
  credentials: {
    accessKeyId: process.env.WASABI_ACCESS_KEY,
    secretAccessKey: process.env.WASABI_SECRET_KEY
  }
});

await wasabi.send(new PutObjectCommand({
  Bucket: "my-bucket",
  Key: "photos/sunset.jpg",
  Body: readFileSync("./sunset.jpg"),
  ContentType: "image/jpeg"
}));

# R2 presigned URL (uses AWS CLI with custom endpoint)
aws s3 presign s3://my-bucket/photos/sunset.jpg \
  --endpoint-url https://ACCOUNT_ID.r2.cloudflarestorage.com \
  --expires-in 3600

# Or serve publicly via r2.dev subdomain (zero egress)
curl https://my-bucket.ACCOUNT_ID.r2.dev/photos/sunset.jpg -o sunset.jpg

# B2 download via S3-compatible endpoint
aws s3 cp s3://my-bucket/photos/sunset.jpg ./sunset.jpg \
  --endpoint-url https://s3.us-west-004.backblazeb2.com

# Or via friendly URL (if bucket is public)
curl https://f004.backblazeb2.com/file/my-bucket/photos/sunset.jpg -o sunset.jpg