# Apache Spark vs Estuary Flow

**Leader by Vioscale score:** Estuary Flow

| Attribute | Apache Spark | Estuary Flow |
|---|---|---|
| **Vioscale score** | 60.5 (38% (low)) | 80.4 (71% (medium)) |
| activity.commits_last_30d | 100 | - |
| adoption.dependent_repos | 8,896 | - |
| adoption.github_stars | 43,882 | - |
| deployment.options | `{"on_prem":true,"self_hosted":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | Apache Spark is an open-source, multi-language distributed computing engine that unifies data engineering, data science, and machine learning workloads. It processes data at scale using batch or streaming paradigms, provides SQL query capabilities for analytics, and includes built-in libraries for machine learning and graph processing. | Estuary provides real-time and batch data movement across hundreds of systems using log-based change capture, event streaming, and traditional extract-load patterns, all without requiring code or infrastructure management. It's designed to power analytics, operational systems, and AI applications with sub-100ms latency in a single managed service. |
| features.capabilities | `{"role":"engine","paradigm":"both","self_hosted_oss":true,"distributed_executor":true}` | `{"cdc":true,"role":"elt","paradigm":"both","managed_cloud":true,"connector_count":"200+","self_hosted_oss":true,"incremental_runs":true,"distributed_executor":true}` |
| integrations.count | 5 | 200 |
| integrations.list | `[{"name":"Hadoop"},{"name":"HDFS"},{"name":"YARN"},{"name":"Kubernetes"},{"name":"Docker"}]` | `[{"name":"Oracle"},{"name":"MySQL"},{"name":"PostgreSQL"},{"name":"Amazon S3"},{"name":"Google Cloud Storage"},{"name":"Azure Blob Storage"},{"name":"NetSuite"},{"name":"HubSpot"},{"name":"Salesforce"},{"name":"Google Pub/Sub"},{"name":"Amazon Kinesis"},{"name":"Apache Kafka"},{"name":"Snowflake"},{"name":"Google BigQuery"},{"name":"Amazon Redshift"},{"name":"Elasticsearch"},{"name":"MongoDB"},{"name":"Amazon DynamoDB"},{"name":"Pinecone"},{"name":"OpenAI"},{"name":"Databricks"},{"name":"Facebook Ads"},{"name":"LinkedIn Ads"},{"name":"Google Ads"},{"name":"SingleStore"},{"name":"Motherduck"},{"name":"Apache Iceberg"}]` |
| language.primary | Scala | - |
| license.spdx | Apache-2.0 | - |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"cli":true}` | `{"web":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://spark.apache.org","retrievedAt":"2026-08-14T13:48:09.654Z"}` | `{"type":"usage","plans":[{"free":true,"name":"Developer Free","summary":"Free forever up to 10GB/month","features":["Access to Cloud Plan features","10GB/month data limit","2 concurrent connectors","Cloud deployment"],"components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"Launch your first pipelines for free","contactSales":false,"includedLimits":{"data_moved":"10GB/month","concurrent_connectors":"2"}},{"free":false,"name":"Cloud","summary":"$0.50/GB + $100/connector, billed monthly","features":["200+ fully-managed connectors","Unlimited users","Millisecond latency or batch","Role-based access control (RBAC)","Bring your own cloud storage","US/EU data processing regions","SSH tunnel support","UI and CLI management","Standard support via community Slack and email","dbt Cloud integration","Kafka compatibility","Real-time monitoring and alerting","50% discount on 6+ connectors"],"components":[{"per":{"qty":1,"unit":"gb"},"kind":"metered","amount":0.5,"currency":"USD"},{"kind":"per_unit","unit":"connector","amount":100,"period":"month","currency":"USD"}],"contactSales":false},{"free":false,"name":"Enterprise","summary":"Custom pricing with volume discounts","features":["All Cloud features","Volume-based discounts","SOC 2 & HIPAA compliance reports","Single sign-on (SSO)","Custom SLA terms","Private and BYOC deployments","Provisioned servers","Custom region support","Private networking (PrivateLink, Google Service Connect)","Performance customization/tuning","Dedicated support via Slack and email","Migration assistance","IAM and advanced authentication","Custom connector development"],"description":"Scaled Pricing","contactSales":true}],"summary":"Usage-based: $0.50/GB + $100/connector/month. Free tier: 10GB/month.","currency":"USD","freeTier":true,"sourceUrl":"https://estuary.dev","retrievedAt":"2026-08-03T14:24:35.648Z","freeTrialDays":30,"startingPrice":{"amount":0.5,"period":"month","currency":"USD"},"billingPeriods":["month"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | free | low |
| pricing.transparent | yes | yes |
| reliability.sla_pct | - | 99.9 |
| reliability.status_page | - | yes |
| security.disclosure_policy | yes | - |
| security.gdpr | - | yes |
| security.hipaa | - | yes |
| security.scorecard | 5.6 | - |
| security.soc2 | - | yes |
| security.vulnerabilities | `{"count":7,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.apache.spark%3Aspark-core_2.10&per_page=100","last_12m":1,"max_severity":"CRITICAL"}` | - |

## Capabilities (Data Engineering Tools)

| Capability | Apache Spark | Estuary Flow |
|---|:--:|:--:|
| **Core** |  |  |
| Tool role | Processing engine | ELT / ingestion |
| Processing paradigm | Batch + streaming | Batch + streaming |
| **Connectivity** |  |  |
| Connector count | - | 200+ |
| CDC / log-based replication | - | ✓ |
| **Transformation** |  |  |
| In-warehouse transformation (push-down) | - | - |
| dbt-native orchestration | - | - |
| **Deployment** |  |  |
| Self-hosted / open-source available | ✓ | ✓ |
| Managed cloud available | - | ✓ |
| **Governance** |  |  |
| Data lineage / asset catalog | - | - |
| **Authoring** |  |  |
| Python-first authoring | - | - |
| **Execution** |  |  |
| Incremental / partition-aware runs | - | ✓ |
| **Quality** |  |  |
| Built-in data quality / tests | - | - |
| **Scale** |  |  |
| Horizontal scale (distributed executor) | ✓ | ✓ |

*Source: Vioscale. Generated 2026-09-01T16:50:43.880Z. "-" = undocumented, not absent.*