diff --git a/spacy/cli/_util.py b/spacy/cli/_util.py
index 125584643..b87e07870 100644
--- a/spacy/cli/_util.py
+++ b/spacy/cli/_util.py
@@ -22,10 +22,14 @@ HELP = """spaCy Command-line Interface
 
 DOCS: https://spacy.io/api/cli
 """
-PROJECT_HELP = f"""Command-line interface for spaCy projects and working with
-project templates. You'd typically start by cloning a project template to a local
-directory and fetching its assets like datasets etc. See the project's
-{PROJECT_FILE} for the available commands.
+PROJECT_HELP = f"""Command-line interface for spaCy projects and templates.
+You'd typically start by cloning a project template to a local directory and
+fetching its assets like datasets etc. See the project's {PROJECT_FILE} for the
+available commands.
+"""
+DEBUG_HELP = """Suite of helpful commands for debugging and profiling. Includes
+commands to check and validate your config files, training and evaluation data,
+and custom model implementations.
 """
 
 # Wrappers for Typer's annotations. Initially created to set defaults and to
@@ -35,7 +39,10 @@ Opt = typer.Option
 
 app = typer.Typer(name=NAME, help=HELP)
 project_cli = typer.Typer(name="project", help=PROJECT_HELP, no_args_is_help=True)
+debug_cli = typer.Typer(name="debug", help=DEBUG_HELP, no_args_is_help=True)
+
 app.add_typer(project_cli)
+app.add_typer(debug_cli)
 
 
 def setup_cli() -> None:
diff --git a/spacy/cli/debug_data.py b/spacy/cli/debug_data.py
index a4bc16828..9d1986d8a 100644
--- a/spacy/cli/debug_data.py
+++ b/spacy/cli/debug_data.py
@@ -7,7 +7,7 @@ from wasabi import Printer, MESSAGES, msg
 import typer
 
 from ._util import app, Arg, Opt, show_validation_error, parse_config_overrides
-from ._util import import_code
+from ._util import import_code, debug_cli
 from ..schemas import ConfigSchema
 from ..gold import Corpus, Example
 from ..syntax import nonproj
@@ -24,8 +24,8 @@ BLANK_MODEL_MIN_THRESHOLD = 100
 BLANK_MODEL_THRESHOLD = 2000
 
 
-@app.command(
-    "debug-config",
+@debug_cli.command(
+    "config",
     context_settings={"allow_extra_args": True, "ignore_unknown_options": True},
 )
 def debug_config_cli(
@@ -35,7 +35,12 @@ def debug_config_cli(
     code_path: Optional[Path] = Opt(None, "--code-path", "-c", help="Path to Python file with additional code (registered functions) to be imported"),
     # fmt: on
 ):
-    """Debug a config file and show validation errors."""
+    """Debug a config.cfg file and show validation errors. The command will
+    create all objects in the tree and validate them. Note that some config
+    validation errors are blocking and will prevent the rest of the config from
+    being resolved. This means that you may not see all validation errors at
+    once and some issues are only shown once previous errors have been fixed.
+    """
     overrides = parse_config_overrides(ctx.args)
     import_code(code_path)
     with show_validation_error():
@@ -45,9 +50,13 @@ def debug_config_cli(
     msg.good("Config is valid")
 
 
+@debug_cli.command(
+    "data", context_settings={"allow_extra_args": True, "ignore_unknown_options": True},
+)
 @app.command(
     "debug-data",
     context_settings={"allow_extra_args": True, "ignore_unknown_options": True},
+    hidden=True,  # hide this from main CLI help but still allow it to work with warning
 )
 def debug_data_cli(
     # fmt: off
@@ -62,10 +71,16 @@ def debug_data_cli(
     # fmt: on
 ):
     """
-    Analyze, debug and validate your training and development data, get useful
-    stats, and find problems like invalid entity annotations, cyclic
-    dependencies, low data labels and more.
+    Analyze, debug and validate your training and development data. Outputs
+    useful stats, and can help you find problems like invalid entity annotations,
+    cyclic dependencies, low data labels and more.
     """
+    if ctx.command.name == "debug-data":
+        msg.warn(
+            "The debug-data command is now available via the 'debug data' "
+            "subcommand (without the hyphen). You can run python -m spacy debug "
+            "--help for an overview of the other available debugging commands."
+        )
     overrides = parse_config_overrides(ctx.args)
     import_code(code_path)
     debug_data(
diff --git a/spacy/cli/debug_model.py b/spacy/cli/debug_model.py
index d6efe13d6..b205f6a19 100644
--- a/spacy/cli/debug_model.py
+++ b/spacy/cli/debug_model.py
@@ -2,12 +2,12 @@ from pathlib import Path
 from wasabi import msg
 from thinc.api import require_gpu, fix_random_seed, set_dropout_rate, Adam
 
-from ._util import app, Arg, Opt
+from ._util import Arg, Opt, debug_cli
 from .. import util
 from ..lang.en import English
 
 
-@app.command("debug-model", hidden=True)
+@debug_cli.command("model")
 def debug_model_cli(
     # fmt: off
     config_path: Path = Arg(..., help="Path to config file", exists=True),
@@ -25,7 +25,8 @@ def debug_model_cli(
     # fmt: on
 ):
     """
-    Analyze a Thinc ML model - internal structure and activations during training
+    Analyze a Thinc model implementation. Includes checks for internal structure
+    and activations during training.
     """
     print_settings = {
         "dimensions": dimensions,
diff --git a/spacy/cli/profile.py b/spacy/cli/profile.py
index 2faf002d0..7c82f7e5b 100644
--- a/spacy/cli/profile.py
+++ b/spacy/cli/profile.py
@@ -7,15 +7,18 @@ import pstats
 import sys
 import itertools
 from wasabi import msg, Printer
+import typer
 
-from ._util import app, Arg, Opt
+from ._util import app, debug_cli, Arg, Opt, NAME
 from ..language import Language
 from ..util import load_model
 
 
-@app.command("profile")
+@debug_cli.command("profile")
+@app.command("profile", hidden=True)
 def profile_cli(
     # fmt: off
+    ctx: typer.Context,  # This is only used to read current calling context
     model: str = Arg(..., help="Model to load"),
     inputs: Optional[Path] = Arg(None, help="Location of input file. '-' for stdin.", exists=True, allow_dash=True),
     n_texts: int = Opt(10000, "--n-texts", "-n", help="Maximum number of texts to use if available"),
@@ -27,6 +30,12 @@ def profile_cli(
     It can either be provided as a JSONL file, or be read from sys.sytdin.
     If no input file is specified, the IMDB dataset is loaded via Thinc.
     """
+    if ctx.parent.command.name == NAME:  # called as top-level command
+        msg.warn(
+            "The profile command is now available via the 'debug profile' "
+            "subcommand. You can run python -m spacy debug --help for an "
+            "overview of the other available debugging commands."
+        )
     profile(model, inputs=inputs, n_texts=n_texts)